Granted Patent
Utility
US 5,117,639 · App. 07/521,331
Automatic cooling system
Inventor:
Masafumi Take
Patented Case
View Patent ↗
Granted: Jun 2, 1992
Filed: May 9, 1990
Inventor
Masafumi Take
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.