Granted Patent
Utility
US 4,391,478 · App. 06/149,573
Drawer seal
Inventor:
Hans C. Grunert
Patented Case
View Patent ↗
Granted: Jul 5, 1983
Filed: May 14, 1980
Inventor
Hans C. Grunert
Assignee (at issue)
Sybron 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.