Granted Patent
Utility
US 4,314,799 · App. 06/131,713
Compression molding machine for organic thermoplastic materials
Inventors:
Stephen W. Amberg, Ralph G. Amberg
Patented Case
View Patent ↗
Granted: Feb 9, 1982
Filed: Mar 19, 1980
Inventors
Stephen W. Amberg
Ralph G. Amberg
Assignee (at issue)
Owens-Illinois 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.