Wilfred W. T. Cheng

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Oakville, CA

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Patents Grantslast 30 patents

Information Patent Grant
Method of using a vented mold
- Patent number RE36413
- Issue date Nov 30, 1999
- Woodbridge Foam Corporation
- Leslie Edward Clark
- 264 - Plastic and nonmetallic article shaping or treating: processes
Information Patent Grant
High pressure mixing system and process for producing foamed isocya...
- Patent number 5,615,949
- Issue date Apr 1, 1997
- Woodbridge Foam Corporation
- Nick Morano
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Mold having vent passageways to obivate trimming of flash
- Patent number 5,587,183
- Issue date Dec 24, 1996
- Woodbridge Foam Corporation
- Leslie E. Clark
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Mold having vent passageways to obviate trimming of flash
- Patent number 5,482,721
- Issue date Jan 9, 1996
- Woodbridge Foam Corporation
- Leslie E. Clark
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of using a vented mold
- Patent number 5,356,580
- Issue date Oct 18, 1994
- Woodbridge Foam Corp.
- Leslie E. Clark
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL