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For the Inventor, By the Inventor

Haar, Germany

Hartmut Schrenk

This inventor holds 23 USPTO granted patents, primarily in Non-Volatile Memory. Top assignee: Siemens Aktiengesellschaft. Active years: 1980-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hartmut Schrenk. Retrieved from https://idiyas.com/inventor/hartmut-schrenk

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank
USPTO Granted Patents = 23

% Patents Active = 100.0

Average Co-Inventor Count = 1.0

ph-index = 12

Forward Citations = 456(Granted Patents)


Company Filing History:

goldMedal23 out of 30,893 
 
Siemens Aktiengesellschaft
 patents

Years Active: 1980-2000

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Areas of Expertise:
Electronic Debit Card
Data Transfer System
Unauthorized Modification Prevention
Integrated Circuit
EEPROM
Access-Controlled Memory
Memory Access Control
Non-Volatile Memory
MOS Inverter Circuit
Functional Testing
Semiconductor Circuit
Manipulation-Proof Devaluation
23 patents (USPTO):Explore Patents
1. 6095411 - Electronic debit card and method for recharging an electronic debit card (2000-08-01),
2. 5889266 - Data transfer system having a terminal and a portable data carrier (1999-03-30),
3. 5678027 - Method for preventing unauthorized modification of data in a device with (1997-10-14),
4. 5511023 - Method and circuit configuration for debiting a debit card (1996-04-23),
5. 5497462 - Method and circuit for protecting circuit configurations having an (1996-03-05),
6. 5014311 - Integrated circuit with an access-controlled data memory (1991-05-07),
7. 5001332 - Method and circuit for manipulation-proof devaluation of EEPROMS (1991-03-19),
8. 4941034 - Integrated semiconductor circuit (1990-07-10),
9. 4910707 - EEPROM with protective circuit (1990-03-20),
10. 4835742 - Word-by-word electrically reprogrammable non-volatile memory and method (1989-05-30),
11. 4819204 - Method for controlling memory access on a chip card and apparatus for (1989-04-04),
12. 4819202 - Release process for an access-controlled user memory and apparatus for (1989-04-04),
13. 4814849 - Monolithically integrated semiconductor circuit (1989-03-21),
14. 4767950 - MOS inverter circuit having two different supply voltages (1988-08-30),
15. 4755970 - Method and apparatus for functional testing of a memory which is (1988-07-05),

Title: Hartmut Schrenk: Innovator in Electronic Payment Technologies

Introduction

Hartmut Schrenk, based in Haar, Germany, is a prolific inventor with a significant portfolio of 23 patents. His work primarily focuses on advancements in electronic payment systems, making a considerable impact in the financial technology sector.

Latest Patents

Among his most notable inventions are two recent patents that showcase his innovative approach to electronic debit cards. The first patent describes an “Electronic debit card and method for recharging an electronic debit card.” This invention incorporates an integrated semiconductor circuit and non-volatile memory, allowing for complex management of value units associated with the debit card. Importantly, it enables simultaneous erasure of memory locations within specific significance subregions, which can only be activated under certain conditions.

The second patent, titled “Data transfer system having a terminal and a portable data carrier,” details a configuration that includes a terminal and a chip card. This system involves recharge mechanisms that check the integrity of data before converting activated value areas into a non-volatile state, enhancing the reliability of electronic transactions.

Career Highlights

Hartmut Schrenk contributes his expertise to Siemens Aktiengesellschaft, one of the leading global technology companies. His role within the company involves collaborating on cutting-edge technological developments in electronic payment systems, aligning with the company's mission to innovate in the digital age.

Collaborations

A key figure in his professional journey is Wolfgang Pockrandt, with whom he collaborates on various projects. Their partnership has led to significant advancements in patenting innovative technologies, ensuring that their combined talents drive forward-thinking solutions in electronic transactions.

Conclusion

Hartmut Schrenk exemplifies the role of inventors in shaping future technologies. His patents not only reflect individual ingenuity but also contribute to the broader landscape of electronic payment systems. As technology continues to evolve, the impact of Schrenk’s work will likely remain influential in the finance sector for years to come.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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