Forward Citations = 50

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8 inventors (with patents filed for the assignee):

Roland Sudler (8 out of 21 patents)

Manfred Stein (3 out of 7 patents)

Jean-Francois Schwab (3 out of 5 patents)

4. Dieter K Busch (1 out of 19 patents)

5. Walter Happel (1 out of 1 patent)

6. Martin Haub (1 out of 5 patents)

7. Norbert Reiferscheid (1 out of 1 patent)

8. Jean-Francois Schwab (1 out of 1 patent)

12 patents: Sort by Forward Citations

1. 4340828 - Single phase stepping motor (1982-07-20),

2. 4315328 - Battery-driven clock with indicator of the end of life of the battery (1982-02-09),

3. 4267472 - Single phase stepping motor, particularly for clocks (1981-05-12),

4. 4254491 - Pulse control for an electric clock (1981-03-03),

5. 4250576 - Electric clock (1981-02-10),

6. 4217509 - Single phase stepping motor (1980-08-12),

7. 4206377 - Single phase stepping motor (1980-06-03),

8. 4206376 - Single phase stepping motor (1980-06-03),

9. 4206375 - Single phase stepping motor (1980-06-03),

10. 4201929 - Single phase stepping motor (1980-05-06),

11. 4176515 - Electronic clock, particularly a quartz clock (1979-12-04),

12. 4142147 - Method and system for testing the accuracy of an electronic clock (1979-02-27),

Company Overview

Quarz-Zeit AG is a prominent player in the precision timekeeping industry, specializing in the development and manufacturing of high-quality quartz timekeeping devices. Based in Frankfurt, Germany, the company focuses on innovative solutions that cater to various sectors, including consumer electronics, industrial applications, and automotive systems. With a commitment to excellence, Quarz-Zeit AG leverages advanced technology and research to enhance the accuracy and reliability of time measurement, positioning itself as a leader in the global market.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

12 Patents

#65 in Frankfurt

#3,300 in Germany

#48,209 in the World

Frankfurt, Germany

Quarz-Zeit Ag

Forward Citations = 50

8 inventors:

Roland Sudler (8 out of 21 patents)

Manfred Stein (3 out of 7 patents)

Jean-Francois Schwab (3 out of 5 patents)

4. Dieter K Busch (1 out of 19 patents)

5. Walter Happel (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Quarz-Zeit Ag. Retrieved from https://idiyas.com/company/quarz-zeit-ag

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

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]