David A. Webb

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Valencia, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for preparing an improved creosote wood preservative from a...
- Patent number 3,973,971
- Issue date Aug 10, 1976
- Koppers Company, Inc.
- Nicholas P. Greco
- B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
Information Patent Grant
Method for preparing an improved creosote wood preservative from a...
- Patent number 3,960,969
- Issue date Jun 1, 1976
- Koppers Company, Inc.
- Nicholas P. Greco
- B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...