Granted Patent
Utility
US 4,406,468 · App. 06/368,302
Seal assembly
Inventors:
James J. Gimple, Richard Weinstein
Patented Case
View Patent ↗
Granted: Sep 27, 1983
Filed: Apr 14, 1982
Inventors
James J. Gimple
Richard Weinstein
Assignee (at issue)
Champion Spark Plug Company
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.