Granted Patent
Utility
US 4,278,089 · App. 05/959,161
Wound drainage device
Inventors:
Charles M. Huck, John E. Studer, Philip H. Sauer
Patented Case
View Patent ↗
Granted: Jul 14, 1981
Filed: Nov 9, 1978
Inventors
Charles M. Huck
John E. Studer
Philip H. Sauer
Assignee (at issue)
Howmedica 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.