Engineering Enterprises, Inc.

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

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Patent	Title	Status	Expires	Confidence
US 3,971,450	Well drilling tool Term ended Term ended no later than Jul 27, 1996 · Low confidence	Term ended	Term ended no later than Jul 27, 1996	Low confidence
US 3,997,009	Well drilling apparatus Term ended Term ended no later than Dec 14, 1996 · Low confidence	Term ended	Term ended no later than Dec 14, 1996	Low confidence
US 4,019,591	Well drilling tool Term ended Term ended no later than Apr 26, 1997 · Low confidence	Term ended	Term ended no later than Apr 26, 1997	Low confidence
US 4,019,592	By-pass tool Term ended Term ended no later than Apr 26, 1997 · Low confidence	Term ended	Term ended no later than Apr 26, 1997	Low confidence
US 4,160,551	Seal assembly Term ended Term ended no later than Jul 10, 1999 · Low confidence	Term ended	Term ended no later than Jul 10, 1999	Low confidence
US 4,256,189	Well drilling tool Term ended Term ended no later than Mar 17, 2001 · Low confidence	Term ended	Term ended no later than Mar 17, 2001	Low confidence
US 4,260,030	Well tool Term ended Term ended no later than Apr 7, 2001 · Low confidence	Term ended	Term ended no later than Apr 7, 2001	Low confidence
US 4,260,032	Well drilling tool Term ended Term ended no later than Apr 7, 2001 · Low confidence	Term ended	Term ended no later than Apr 7, 2001	Low confidence
US 4,260,167	Well drilling tool Term ended Term ended no later than Apr 7, 2001 · Low confidence	Term ended	Term ended no later than Apr 7, 2001	Low confidence
US 4,284,149	Well drilling tool Term ended Term ended no later than Aug 18, 2001 · Low confidence	Term ended	Term ended no later than Aug 18, 2001	Low confidence

10 of 15 patents shown.

Pro members see all 15.

Pro members: see all 15 patents