Granted Patent
Utility
US 5,873,574 · App. 08/683,733
Bellows seal with reverse pressure capability
Inventor:
Yoram Ringer
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Jul 18, 1996
Inventor
Yoram Ringer
Assignee (at issue)
John Crane Sealol 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.