Granted Patent
Utility
US 5,239,920 · App. 07/719,922
Can crusher apparatus
Inventors:
David A Schuff, Roy C. Burnett
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Jun 24, 1991
Inventors
David A Schuff
Roy C. Burnett
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.