Robert O. Dark

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Kingston, CA

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Patents Grantslast 30 patents

Information Patent Grant
Retro-reflecting sheet material
- Patent number 4,340,273
- Issue date Jul 20, 1982
- Alcan Research and Development Limited
- Stanton E. Jack
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Retro-reflecting sheet material and method of making same
- Patent number 4,265,938
- Issue date May 5, 1981
- Alcan Research and Development Limited
- Stanton E. Jack
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL