David Cheng Cheng

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Delta, CA

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Patents Grantslast 30 patents

Information Patent Grant
Reconfigurable tilt wheelchair
- Patent number 8,579,315
- Issue date Nov 12, 2013
- PDG Product Design Group Inc.
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Reconfigurable tilt wheelchair
- Patent number 8,511,699
- Issue date Aug 20, 2013
- PDG Product Design Group Inc.
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Telescoping crossbar assembly
- Patent number 8,424,896
- Issue date Apr 23, 2013
- PDG Product Design Group Inc.
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Reconfigurable tilt wheelchair
- Patent number 8,336,898
- Issue date Dec 25, 2012
- PDG Product Design Group Inc.
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Reconfigurable tilt wheelchair
- Patent number 8,132,823
- Issue date Mar 13, 2012
- PDG Product Design Group Inc.
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Reconfigurable tilt wheelchair
- Patent number 7,871,094
- Issue date Jan 18, 2011
- PDG, Inc.
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Wheelchair member
- Patent number D589411
- Issue date Mar 31, 2009
- PDG Inc.
- Torr Brown
- D12 - Transportation

Patents Applicationslast 30 patents

Information Patent Application
RECONFIGURABLE TILT WHEELCHAIR
- Publication number 20130062858
- Publication date Mar 14, 2013
- PDG PRODUCT DESIGN GROUP INC.
- Nancy BALCOM
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
RECONFIGURABLE TILT WHEELCHAIR
- Publication number 20120119466
- Publication date May 17, 2012
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
RECONFIGURABLE TILT WHEELCHAIR
- Publication number 20120104726
- Publication date May 3, 2012
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
RECONFIGURABLE TILT WHEELCHAIR
- Publication number 20120104724
- Publication date May 3, 2012
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
RECONFIGURABLE TILT WHEELCHAIR
- Publication number 20110068553
- Publication date Mar 24, 2011
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
RECONFIGURABLE TILT WHEELCHAIR
- Publication number 20090045599
- Publication date Feb 19, 2009
- Nancy Balcom
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE