Granted Patent
Utility
US 4,436,459 · App. 06/032,209
Pneumatic stream divider
Inventor:
Lawrence G. Caldwell
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Apr 23, 1979
Inventor
Lawrence G. Caldwell
Assignee (at issue)
The Ducon Company, 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.