Llewellyn Lee Johnston

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Vancouver, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Portion of a mold insert for forming concrete blocks
- Patent number D622416
- Issue date Aug 24, 2010
- Westblock Systems, Inc.
- James E. Hammer
- D25 - Building units and construction elements
Information Patent Grant
Insert for mold for forming concrete blocks
- Patent number D610268
- Issue date Feb 16, 2010
- Westblock Systems, Inc.
- James E. Hammer
- D25 - Building units and construction elements
Information Patent Grant
Insert for mold for forming concrete blocks
- Patent number D595867
- Issue date Jul 7, 2009
- Westblock Systems, Inc.
- James E. Hammer
- D25 - Building units and construction elements