Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6095411 | Electronic debit card and method for recharging an electronic debit card | — | 2000-08-01 |
| 5889266 | Data transfer system having a terminal and a portable data carrier configuration and method for recharging the portable data carrier configuration using the terminal | — | 1999-03-30 |
| 5678027 | Method for preventing unauthorized modification of data in a device with a nonvolatile memory | Wolfgang Pockrandt | 1997-10-14 |
| 5511023 | Method and circuit configuration for debiting a debit card | — | 1996-04-23 |
| 5497462 | Method and circuit for protecting circuit configurations having an electrically programmable non-volatile memory | — | 1996-03-05 |
| 5014311 | Integrated circuit with an access-controlled data memory | — | 1991-05-07 |
| 5001332 | Method and circuit for manipulation-proof devaluation of EEPROMS | — | 1991-03-19 |
| 4941034 | Integrated semiconductor circuit | — | 1990-07-10 |
| 4910707 | EEPROM with protective circuit | — | 1990-03-20 |
| 4835742 | Word-by-word electrically reprogrammable non-volatile memory and method of operation thereof | — | 1989-05-30 |
| 4819204 | Method for controlling memory access on a chip card and apparatus for carrying out the method | — | 1989-04-04 |
| 4819202 | Release process for an access-controlled user memory and apparatus for carrying out the process | — | 1989-04-04 |
| 4814849 | Monolithically integrated semiconductor circuit | — | 1989-03-21 |
| 4767950 | MOS inverter circuit having two different supply voltages | — | 1988-08-30 |
| 4755970 | Method and apparatus for functional testing of a memory which is reprogrammable electrically word by word | — | 1988-07-05 |
| 4712177 | Circuit for a cord carrier having a memory and an access control unit for secure data access | — | 1987-12-08 |
| 4680736 | Method for operating a user memory designed a non-volatile write-read memory, and arrangement for implementing the method | — | 1987-07-14 |
| 4675544 | CMOS-inverter | — | 1987-06-23 |
| 4648076 | Circuit having a data memory and addressing unit for reading, writing and erasing the memory | — | 1987-03-03 |
| 4638457 | Method and apparatus for the non-volatile storage of the count of an electronic counting circuit | — | 1987-01-20 |
| 4572946 | Credit card circuit arrangement with a memory and an access control unit | — | 1986-02-25 |
| 4279024 | Word-by-word electrically reprogrammable nonvolatile memory | — | 1981-07-14 |
| 4209849 | Non-volatile memory which can be erased word by word constructed in the floating gate technique | — | 1980-06-24 |