Granted Patent
Utility
US 5,655,894 · App. 08/442,411
Controlled prevention of premature snuffle valve actuation in high pressure membrane pumps
Inventor:
Horst Fritsch
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: May 16, 1995
Inventor
Horst Fritsch
Assignee (at issue)
LEWA Herbert Ott GmbH + Co. KG
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.