Granted Patent
Utility
US 4,068,273 · App. 05/647,451
Hybrid power switch
Inventor:
Albert Metzler
Patented Case
View Patent ↗
Granted: Jan 10, 1978
Filed: Jan 8, 1976
Inventor
Albert Metzler
Assignee (at issue)
International Telephone and Telegraph Corporation
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.