Granted Patent
Utility
US 4,451,507 · App. 06/437,835
Automatic liquid dispensing apparatus for spinning surface of uniform thickness
Inventors:
John P. Beltz, Kenneth Warren Hang
Patented Case
View Patent ↗
Granted: May 29, 1984
Filed: Oct 29, 1982
Inventors
John P. Beltz
Kenneth Warren Hang
Assignee (at issue)
RCA Corporation
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.