Granted Patent
Utility
US 5,038,677 · App. 07/403,883
Can crusher with crimping member
Inventors:
Boyd C. Wittman, Barry Gregerson
Patented Case
View Patent ↗
Granted: Aug 13, 1991
Filed: Sep 7, 1989
Inventors
Boyd C. Wittman
Barry Gregerson
Assignee (at issue)
Empak, 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.