Granted Patent
Utility
US 4,342,894 · App. 06/194,427
Electrical switch construction diaphragm seal therefor and methods of making the same
Inventors:
Douglas R. Scott, Frank Payne
Patented Case
View Patent ↗
Granted: Aug 3, 1982
Filed: Oct 6, 1980
Inventors
Douglas R. Scott
Frank Payne
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE 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.