Granted Patent
Utility
US 5,284,084 · App. 07/794,348
Light weight piston
Inventors:
Frederick B. Pippert, John Thomas Rogers
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Nov 12, 1991
Inventors
Frederick B. Pippert
John Thomas Rogers
Assignee (at issue)
Utex Industries 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.