Granted Patent
Utility
US 4,504,253 · App. 06/419,017
Material mixing apparatus
Inventors:
Floyd E. Buschbom, Donald L. Henke
Patented Case
View Patent ↗
Granted: Mar 12, 1985
Filed: Sep 16, 1982
Inventors
Floyd E. Buschbom
Donald L. Henke
Assignee (at issue)
Veda Incorporated
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.