Granted Patent
Utility
US 4,197,521 · App. 05/951,705
Thick film fusing resistor
Inventor:
Richard M. Rovnyak
Patented Case
View Patent ↗
Granted: Apr 8, 1980
Filed: Oct 16, 1978
Inventor
Richard M. Rovnyak
Assignee (at issue)
GTE Automatic Electric Laboratories, Incorporated
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.