Granted Patent
Utility
US 6,254,331 · App. 09/244,569
Coupler for connecting an attachment to the free end of a boom
Inventors:
Walter J. Pisco, MICHAEL HART
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Feb 4, 1999
Inventors
Walter J. Pisco
MICHAEL HART
Assignee (at issue)
Pacific Services & Mfg.
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.