Granted Patent
Utility
US 4,290,130 · App. 06/106,174
Digital frequency trimmed electronic timepiece
Inventors:
John R. Lowdenslager, Norman C. Zatsky
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Dec 21, 1979
Inventors
John R. Lowdenslager
Norman C. Zatsky
Assignee (at issue)
Timex Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.