Granted Patent
Utility
US 5,421,621 · App. 08/076,418
Packing manifold for slip-type expansion joints
Inventor:
David A. Schaefer
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: Jun 14, 1993
Inventor
David A. Schaefer
Assignee (at issue)
Adsco Manufacturing Company
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.