Granted Patent
Utility
US 4,389,772 · App. 06/163,743
Electric dry shaver
Inventors:
Donald J. Coleman, Wilbur C. Jackson, Robert R. Lube, Albert R. Spohr
Patented Case
View Patent ↗
Granted: Jun 28, 1983
Filed: Jun 27, 1980
Inventors
Donald J. Coleman
Wilbur C. Jackson
Robert R. Lube
Albert R. Spohr
Assignee (at issue)
Sunbeam Corporation 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.