Schrenk; Hartmut

Patent Applications and Registrations

Patent applications and USPTO patent grants for Schrenk; Hartmut.The latest application filed is for "electronic debit card and method for recharging an electronic debit card".

Company Profile

0.18.0

Schrenk; Hartmut - Haar DE

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Electronic debit card and method for recharging an electronic debit card Grant 6,095,411 - Schrenk August 1, 2	2000-08-01
Data transfer system having a terminal and a portable data carrier configuration and method for recharging the portable data carrier configuration using the terminal Grant 5,889,266 - Schrenk March 30, 1	1999-03-30
Method for preventing unauthorized modification of data in a device with a nonvolatile memory Grant 5,678,027 - Pockrandt , et al. October 14, 1	1997-10-14
Method and circuit configuration for debiting a debit card Grant 5,511,023 - Schrenk April 23, 1	1996-04-23
Integrated circuit with an access-controlled data memory Grant 5,014,311 - Schrenk May 7, 1	1991-05-07
Method and circuit for manipulation-proof devaluation of EEPROMS Grant 5,001,332 - Schrenk March 19, 1	1991-03-19
Word-by-word electrically reprogrammable non-volatile memory and method of operation thereof Grant 4,835,742 - Schrenk May 30, 1	1989-05-30
Method for controlling memory access on a chip card and apparatus for carrying out the method Grant 4,819,204 - Schrenk April 4, 1	1989-04-04
Monolithically integrated semiconductor circuit Grant 4,814,849 - Schrenk March 21, 1	1989-03-21
MOS inverter circuit having two different supply voltages Grant 4,767,950 - Schrenk August 30, 1	1988-08-30
Method and apparatus for functional testing of a memory which is reprogrammable electrically word by word Grant 4,755,970 - Schrenk July 5, 1	1988-07-05
Circuit for a cord carrier having a memory and an access control unit for secure data access Grant 4,712,177 - Schrenk December 8, 1	1987-12-08
Method for operating a user memory designed a non-volatile write-read memory, and arrangement for implementing the method Grant 4,680,736 - Schrenk July 14, 1	1987-07-14
Circuit having a data memory and addressing unit for reading, writing and erasing the memory Grant 4,648,076 - Schrenk March 3, 1	1987-03-03
Method and apparatus for the non-volatile storage of the count of an electronic counting circuit Grant 4,638,457 - Schrenk January 20, 1	1987-01-20
Credit card circuit arrangement with a memory and an access control unit Grant 4,572,946 - Schrenk February 25, 1	1986-02-25
Word-by-word electrically reprogrammable nonvolatile memory Grant 4,279,024 - Schrenk July 14, 1	1981-07-14
Non-volatile memory which can be erased word by word constructed in the floating gate technique Grant 4,209,849 - Schrenk June 24, 1	1980-06-24

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