Granted Patent
Utility
US 4,379,663 · App. 06/189,673
Vacuum sequencing system with weight controlled material draw cycle
Inventor:
Robert D. Allison, III
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: Sep 22, 1980
Inventor
Robert D. Allison, III
Assignee (at issue)
MAC Equipment, 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.