Granted Patent
Utility
US 4,155,693 · App. 05/927,108
Embossed screen assembly
Inventor:
Garland E. Raley
Patented Case
View Patent ↗
Granted: May 22, 1979
Filed: Jul 24, 1978
Inventor
Garland E. Raley
Assignee (at issue)
Ethyl 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.