Granted Patent
Utility
US 4,237,014 · App. 06/019,159
Flowable material passage with interposable slide member
Inventor:
Delano B. Trott
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Mar 12, 1979
Inventor
Delano B. Trott
Assignee (at issue)
Beringer
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.