Granted Patent
Utility
US 4,923,657 · App. 07/228,372
Method for making plastic parts
Inventors:
John C. Gembinski, Robert A. Grimmer, Patricia A. Betzig
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Aug 4, 1988
Inventors
John C. Gembinski
Robert A. Grimmer
Patricia A. Betzig
Assignee (at issue)
Davidson Textron, 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.