Armstrong Machine Works

Also on record

Records under this name other than patents Armstrong Machine Works holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

Showing 1 to 6 of 6 · Back to Armstrong Machine Works

Patent	Title	Status	Expires	Confidence
US 3,936,023	Light holder Term ended Term ended no later than Feb 3, 1996 · Low confidence	Term ended	Term ended no later than Feb 3, 1996	Low confidence
US 4,096,876	Condensate controller Term ended Term ended no later than Jun 27, 1998 · Low confidence	Term ended	Term ended no later than Jun 27, 1998	Low confidence
US 4,146,775	Automatic control system for an electrode-type air humidifier Term ended Term ended no later than Mar 27, 1999 · Low confidence	Term ended	Term ended no later than Mar 27, 1999	Low confidence
US 4,149,557	Inverted bucket steam trap Term ended Term ended no later than Apr 17, 1999 · Low confidence	Term ended	Term ended no later than Apr 17, 1999	Low confidence
US 4,305,548	Energy loss detection system Term ended Term ended no later than Dec 15, 2001 · Low confidence	Term ended	Term ended no later than Dec 15, 2001	Low confidence
US 4,456,173	Energy loss detection system Formerly held Term ended Term ended no later than Jun 26, 2004 · Low confidence	Term ended	Term ended no later than Jun 26, 2004	Low confidence