Granted Patent
Utility
US 4,846,376 · App. 07/160,365
Inversion foamer
Inventor:
Darrel Palmer
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Feb 25, 1988
Inventor
Darrel Palmer
Assignee (at issue)
Ballard Medical Products
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.