Granted Patent
Utility
US 4,536,627 · App. 06/616,032
Expanded interval timer drive mechanism
Inventor:
John P. Duve
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Jun 1, 1984
Inventor
John P. Duve
Assignee (at issue)
The Singer Company Limited
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.