Peter A. Speer

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Kirkland, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
One-way roadway marker
- Patent number 5,515,807
- Issue date May 14, 1996
- Davidson Plastics Corporation
- Peter A. Speer
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Temporary roadway marker
- Patent number 5,460,115
- Issue date Oct 24, 1995
- Davidson Plastics Corporation
- Peter A. Speer
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Roadway markers with concave curved edges
- Patent number 5,392,728
- Issue date Feb 28, 1995
- Davidson Plastic Company
- Peter A. Speer
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Roadway marker
- Patent number 5,327,850
- Issue date Jul 12, 1994
- Davidson Plastics Company
- Michael W. Sly
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES