Granted Patent
Utility
US 4,879,647 · App. 06/873,020
Watchdog timer circuit suited for use in microcomputer
Inventor:
Akira Yazawa
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Jun 11, 1986
Inventor
Akira Yazawa
Assignee (at issue)
NEC 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.