Dale A. Sellner

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Owatonna, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Railing for portable staging
- Patent number 5,263,550
- Issue date Nov 23, 1993
- Wenger Corporation
- Michael D. Jines
- E04 - BUILDING
Information Patent Grant
Adjustable stairway having retractable wheel carriage
- Patent number 4,768,617
- Issue date Sep 6, 1988
- Wenger Corporation
- John E. Mason
- B64 - AIRCRAFT AVIATION COSMONAUTICS