| 5689559 |
Copy prevention method and apparatus of a digital magnetic recording/reproducing system |
| Nov-18-1997 |
A copy prevention method and apparatus of a digital magnetic recording/reproducing system performs the copy prevention function by encoding to insert a marker involving copy prevention function information... |
| 5684785 |
Optical disk and method of preventing fraudulent use of optical disk rotation synchronous control system |
| Nov-4-1997 |
A method of preventing a fraudulent use of an optical disk having a read-write region and a read-only region, comprising the steps of: writing data for designating the boundary between the read-write region... |
| 5675645 |
Method and apparatus for securing executable programs against copying |
| Oct-7-1997 |
A secure system for executing program code in an insecure environment while making it impossible, or at least impractical, to determine how to copy the program code and associated data is provided. A program... |
| 5673357 |
Video recording, transmitting and reproducing apparatus with concurrent recording and transmitting or multiple dubbing of copy protected video signals |
| Sep-30-1997 |
A recording and reproducing apparatus records and reproduces video signals which include video information and copy protection information for restricting the number of times the video information may... |
| 5668873 |
Video signal processor with copy prevention function |
| Sep-16-1997 |
A video signal processor is capable of executing on/off control of a copy inhibiting process and rendering extremely difficult any illegal cancellation of the copy inhibiting process by a third person.... |
| 5661800 |
Method and manufacture for preventing unauthorized use by judging the corresponding relationship between logical and physical addresses |
| Aug-26-1997 |
In case that software is written on a recording medium at physical addresses thereof in units of a prescribed size and the software is subsequently executed upon being read out of the recording medium... |
| 5646993 |
Information reproducing method and apparatus having protect function and recording medium used in apparatus |
| Jul-8-1997 |
In reproduction of information, a decoding program is reproduced from an information recording medium on which information is enciphered and recorded, and an encryption key and the decoding program, which... |
| 5621810 |
Image reading or processing with ability to prevent copying of certain originals |
| Apr-15-1997 |
There is disclosed an apparatus for image reading or processing, that can precisely identify a particularly pattern, such as of banknotes or securities faithful copying of which is to be prohibited. The... |
| 5588137 |
Data flow control apparatus and memory apparatus |
| Dec-24-1996 |
There are provided a data flow control apparatus for outputting data through a switchover and a memory apparatus in which such a data flow control apparatus is incorporated. A replacement data is defined... |
| 5533124 |
Electronic trading card system |
| Jul-2-1996 |
Computer implemented trading cards are disclosed. Trading card software is stored on a removable medium in a copy protected form. The trading card software includes trading card data and an executable... |
| 5461220 |
Method of inhibiting information recording on specific region of recording medium or information reproduction therefrom and information processing system therefor |
| Oct-24-1995 |
A signal for designating a portion of information regions of a recording medium is sent from an external apparatus to an information processing apparatus so as to cause the information processing apparatus... |
| 5457668 |
Data processing system with collating processing at start up for determining the presence of an improper optical CD |
| Oct-10-1995 |
Various data required for a game as well as first collating music data are recorded on a CD-ROM (4). On the other hand, second collating music data and collating program data are stored in a ROM (302)... |
| 5453968 |
Methods of and information recording devices for recording and/or inhibiting recording of an information signal having copy bits with logic values which alternate in accordance with a pattern |
| Sep-26-1995 |
Methods of and information recording devices for recording and/or inhibiting recording of a signal including copy bits on a record carrier, and a record carrier including that signal. The signal has successive... |
| 5428685 |
IC memory card and method of protecting data therein |
| Jun-27-1995 |
A method of protecting data in an IC memory card (11) having a ROM area (11a) and a RAM area (11b) and used as an external storage medium of a computer system includes storing key data for preventing copying... |
| 5424807 |
Image processing apparatus with forgery prevention system |
| Jun-13-1995 |
The present invention relates to an image processing apparatus and a method therefor for processing an input image and recording it on a recording medium. In particular, a predetermined original is registered... |
| 5418852 |
Unauthorized use prevention method for optical disks, optical disk having unauthorized use prevention function, and optical disk apparatus |
| May-23-1995 |
In a method for preventing unauthorized use of a recording medium having a user accessible area and a user inaccessible area, first information is read from the user inaccessible area of the recording... |
| 5408531 |
Information recording/reproducing apparatus for converting and processing data exceeding error correction ability at recording |
| Apr-18-1995 |
After an error correcting code is added to a data to be recorded at recording, a data converting process, such as data rotation or data interchange is executed so as to exceed an error correcting ability... |
| 5295187 |
Illegal copy prevention apparatus |
| Mar-15-1994 |
An illegal copy prevention apparatus including a plurality of illegal copy discriminators (e.g. instructions to set flags), an event generator (e.g. detections of "0" sec in real time) corresponding to... |
| 5293422 |
Usage control system for computer software |
| Mar-8-1994 |
A system for making computer software consumable is provided. The software comprises a set of units, each of the units being an interactive activity between the program and the user which can be separately... |
| 5199066 |
Method and apparatus for protecting software |
| Mar-30-1993 |
A method and system for protecting a software program recorded within a storage medium for use with or transmission to computer or processor based hardware comprises inputting a hardware code uniquely... |
| 5185792 |
Recording and reproducing apparatus with limited digital copying |
| Feb-9-1993 |
A composite digital signal received by a recording and reproducing apparatus includes a digital information signal and a control signal. The control signal represents a number of digital copy generation... |
| 5166886 |
System to demonstrate and sell computer programs |
| Nov-24-1992 |
Centralized broadcast of a plurality of computer programs through a point to multipoint communications medium to a plurality of computers able to select, receive and execute computer programs from within... |
| 5155827 |
Method for inhibiting an executable program in a disk operating system by replacing the program with an unexecutable program |
| Oct-13-1992 |
A computer program, comprising a series of batch processes filed on a separte distribution disk, inhibits an executable program in a disk operating system (DOS). In one embodiment, the batch file of a... |
| 5144658 |
Repeater of digital audio interface signal |
| Sep-1-1992 |
A digital audio interface signal repeater capable of displaying how many generations a further copying of a digital audio interface signal is allowed includes: a receiving device for receiving a digital... |
| 5131091 |
Memory card including copy protection |
| Jul-14-1992 |
Data for protecting software is written into a ROM for protecting software in an IC card including other ROMs for storing data and scrambled software. The data for protecting software provides a key for... |
| 5073925 |
Method and apparatus for the protection of signal copy |
| Dec-17-1991 |
An apparatus for the protection of signal copy for preventing unauthorized copying of music software such as records, compact discs and music tape by recording is arranged such that when recording audio... |
| 5034980 |
Microprocessor for providing copy protection |
| Jul-23-1991 |
A microprocessor is encrypted with a unique code during its manufacture. When copy protection of software designed to operate with the microprocessor is desired, software is encrypted to function uniquely... |
| 5033084 |
Method and apparatus for protection of software in an electronic system |
| Jul-16-1991 |
A method and apparatus for protecting software used in an electronic system. An electronic key is associated with the software, which is at least partially unreadable unless modified. The electronic system... |
| 5027398 |
Copy prevention apparatus and method therefor |
| Jun-25-1991 |
In the copy prevention apparatus and its method, it is discriminated whether an object is legally copied or not; a constant event is generated at or below a predetermined probability; and an abnormal operation... |
| 4999806 |
Software distribution system |
| Mar-12-1991 |
A central station distributes software by telephone. The central station accepts credit card information, transmits an acceptance code to a caller and then terminates the call. After verifying the credit... |
| 4979210 |
Method and apparatus for protection of signal copy |
| Dec-18-1990 |
An apparatus for the protection of signal copy for prevention unauthorized copying of music software such as records, compact discs and music tape by recording is arranged such that when recording audio... |
| 4965680 |
Apparatus for releasing a restriction on the recording of an information signal on a recording medium |
| Oct-23-1990 |
A recording/reproducing system according to this invention for use in, for example, a digital audio tape recorder is applied to a type in which recording of an input information signal on a recording medium... |
| 4905278 |
Scrambling of analogue electrical signals |
| Feb-27-1990 |
In a system in which an audio signal is scrambled by being divided into blocks each comprising a plurality of segments, and the segments are re-ordered within the blocks to provide the scrambled signal,... |
| 4903296 |
Implementing a shared higher level of privilege on personal computers for copy protection of software |
| Feb-20-1990 |
Method and apparatus which restricts software, distributed on magnetic media, to use on a single computing machine. The original medium is functionally uncopyable, until it is modified by the execution... |
| 4802212 |
Method and device for preventing tape piracy |
| Jan-31-1989 |
A device is disclosed to prevent the unauthorized copying of magnetic tapes (tape "piracy"). The device utilizes an inaudible signal encoded into the tape program as the master recording is being made.... |
| 4706282 |
Decoder for a recorder-decoder system |
| Nov-10-1987 |
An improved decoder for a recorder-decoder system wherein a threshold level detector is included in the decoder. The recorder provides for the recording of an audio signal plus a data signal. The data... |
| 4646234 |
Anti-piracy system using separate storage and alternate execution of selected proprietary and public portions of computer programs |
| Feb-24-1987 |
A system for computer software protection includes a random access memory (RAM) device and one or more read-only memory (ROM) devices. The RAM and ROMs are connected in parallel to a data transfer bus,... |
| 4595950 |
Method and apparatus for marking the information content of an information carrying signal |
| Jun-17-1986 |
An information signal (INF) which is transmitted in coded form (CINF) from a signal source (RC) to a signal receiver (4, 5) is decoded at the receiver and at the same time marked (MINF) by the introduction... |
| 4584641 |
Copyprotecting system for software protection |
| Apr-22-1986 |
A means for copyprotecting disks. The present invention may be utilized with both blank and programmed disks. Permanent random input/output errors such as an absence of magnetic material are placed on... |
| 4513174 |
Software security method using partial fabrication of proprietary control word decoders and microinstruction memories |
| Apr-23-1985 |
For a microcomputer system including a program memory and a microprocessor having means for executing sets of microinstructions which includes an instruction decoder and a microinstruction memory for storing... |
| 4462078 |
Computer program protection method |
| Jul-24-1984 |
A computer program protection method which permits copying of the program by a user, but which incorporates a novel information coding technique to prevent operational response by the computer using a... |
