Roelof J. Siepel

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Earlham, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Support brace for window frames in poured concrete walls
- Patent number 10,844,617
- Issue date Nov 24, 2020
- MONARCH MATERIALS GROUP, INC.
- Ahmad Ahmad
- E04 - BUILDING
Information Patent Grant
Window well cover
- Patent number 8,250,815
- Issue date Aug 28, 2012
- Monarch Materials Group, Inc.
- Roelof J. Siepel
- E04 - BUILDING

Patents Applicationslast 30 patents

Information Patent Application
WINDOW WELL COVER
- Publication number 20120174499
- Publication date Jul 12, 2012
- Roelof J. Siepel
- E04 - BUILDING