IP Library Granted Patent US 6,679,289
Granted Patent Utility
US 6,679,289 · App. 09/968,257

Swing check valve

Inventor: David E. Sisk
Patented Case View Patent ↗
Granted: Jan 20, 2004 Filed: Oct 1, 2001
Inventor
David E. Sisk
Assignee (at issue)
Sure Seal, 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.

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Quick Facts
Patent No.
US 6,679,289
App. No.
09/968,257
Filed
2001-10-01
Granted
2004-01-20
Kind
B2