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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),

Quarz-zeit Ag is a leading manufacturer of high-quality quartz watches. Founded in 1995, the company has established a strong presence in the watch industry with its innovative designs and precise timekeeping. With a focus on craftsmanship and attention to detail, Quarz-zeit Ag has earned a reputation for producing reliable and stylish timepieces.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

12 Patents

#56 in Frankfurt am Main

#3,267 in Germany

#46,685 in the World

Frankfurt am Main, Germany

Quarz-zeit Ag