David R. Roberts

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St. Helens, GB

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Patents Grantslast 30 patents

Information Patent Grant
Structural glass unit
- Patent number 5,138,804
- Issue date Aug 18, 1992
- Pilkington PLC
- David R. Roberts
- B32 - LAYERED PRODUCTS
Information Patent Grant
Structural glass unit
- Patent number 5,027,567
- Issue date Jul 2, 1991
- Pilkington PLC
- David R. Roberts
- B32 - LAYERED PRODUCTS