Granted Patent
Utility
US 4,797,004 · App. 07/101,858
Material mixer
Inventor:
Floyd E. Buschbom
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Sep 28, 1987
Inventor
Floyd E. Buschbom
Assignee (at issue)
Vandale, 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.