Granted Patent
Utility
US 4,015,603 · App. 05/621,600
Surgical drainage system with pressure indicator
Inventors:
Leonard D. Kurtz, Robert E. Bidwell
Patented Case
View Patent ↗
Granted: Apr 5, 1977
Filed: Oct 10, 1975
Inventors
Leonard D. Kurtz
Robert E. Bidwell
Assignee (at issue)
Deknatel 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.