Donald M. Steen

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Morrill, NE, US

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Patents Grantslast 30 patents

Information Patent Grant
Flame retardant compositions and methods of preparing and using same
- Patent number 4,174,223
- Issue date Nov 13, 1979
- Donald M. Steen
- B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...