Granted Patent
Utility
US 4,330,093 · App. 06/176,610
Thumb-controlled hand-held tool
Inventor:
Ivan B. Chapman, Jr.
Patented Case
View Patent ↗
Granted: May 18, 1982
Filed: Aug 8, 1980
Inventor
Ivan B. Chapman, Jr.
Assignee (at issue)
Western Electric Company, 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.