Mark D. Porter

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Caledonia, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Window assembly for partitions
- Patent number 6,513,288
- Issue date Feb 4, 2003
- Steelcase Development Corporation
- Douglas B. MacDonald
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS