Mitchell H. Hetrich

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Greenville, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Ladder, member for connecting a rail to a horizontal element of a l...
- Patent number 6,142,255
- Issue date Nov 7, 2000
- Werner Co.
- David E. Plotner
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Ladder, member for connecting a rail to a horizontal element of a l...
- Patent number 5,791,439
- Issue date Aug 11, 1998
- Werner Co.
- David E. Plotner
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Extension ladder, combination end cap/guide bracket, and method for...
- Patent number 5,758,745
- Issue date Jun 2, 1998
- Werner Co.
- Robert D. Beggs
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Ladder, member for connecting a rail to a horizontal element of a l...
- Patent number 5,636,706
- Issue date Jun 10, 1997
- Werner Co.
- David E. Plotner
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS