Granted Patent
Utility
US 4,258,272 · App. 06/021,495
TTL to CMOS input buffer circuit
Inventor:
Jen-Yen Huang
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Mar 19, 1979
Inventor
Jen-Yen Huang
Assignee (at issue)
NATIONAL SEMICONDUCTOR 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.