Granted Patent
Utility
US 4,316,673 · App. 06/093,360
Mixing device for simultaneously dispensing two-part liquid compounds from packaging kit
Inventor:
Spencer J. Speer
Patented Case
View Patent ↗
Granted: Feb 23, 1982
Filed: Nov 13, 1979
Inventor
Spencer J. Speer
Assignee (at issue)
General Dynamics Corp., Pomona Division
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.