Granted Patent
Utility
US 4,228,690 · App. 06/064,029
Drive and clutch for a timing mechanism
Inventor:
Thomas F. Ring
Patented Case
View Patent ↗
Granted: Oct 21, 1980
Filed: Aug 6, 1979
Inventor
Thomas F. Ring
Assignee (at issue)
Emhart Industries, Inc.
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.