Granted Patent
Utility
US 4,920,864 · App. 07/338,196
Reinforced piston
Inventors:
Thomas J. Skingle, Milton W. Toaz
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Apr 14, 1989
Inventors
Thomas J. Skingle
Milton W. Toaz
Assignee (at issue)
JPI Transportation Products, 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.