Granted Patent
Utility
US 4,859,873 · App. 07/074,905
CMOS Schmitt trigger with independently biased high/low threshold circuits
Inventors:
Timothy G. O'Shaughnessy, Richard W. Hull
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Jul 17, 1987
Inventors
Timothy G. O'Shaughnessy
Richard W. Hull
Assignee (at issue)
Western Digital
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.