Granted Patent
Utility
US 4,932,409 · App. 07/341,477
Seal element in an implantable medical apparatus
Inventor:
Jakub Hirschberg
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Apr 21, 1989
Inventor
Jakub Hirschberg
Assignee (at issue)
Siemens Aktiengesellschaft
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.