Granted Patent
Utility
US 4,210,996 · App. 05/900,300
Trimming method for resistance value of polycrystalline silicon resistors especially used as semiconductor integrated circuit resistors
Inventors:
Yoshihito Amemiya, Kotaro Kato
Patented Case
View Patent ↗
Granted: Jul 8, 1980
Filed: Apr 26, 1978
Inventors
Yoshihito Amemiya
Kotaro Kato
Assignee (at issue)
Nippon Telegraph and Telephone Public 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.