Granted Patent
Utility
US 4,635,945 · App. 06/842,182
Anti-extrusion seal with primary and secondary complementary elements
Inventor:
Gerald H. Beck
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Mar 21, 1986
Inventor
Gerald H. Beck
Assignee (at issue)
Microdot 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.