David Campbell

Follow

Person

Bathgate, GB

People

Patents Grantslast 30 patents

Information Patent Grant
Air pressure attenuation device
- Patent number 10,969,050
- Issue date Apr 6, 2021
- Heriot-Watt University
- Michael Gormley
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Method and equipment for detecting sealing deficiencies in drainage...
- Patent number 8,336,368
- Issue date Dec 25, 2012
- Heriot-Watt University
- John Swaffield
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Positive air pressure attenuation device for drainage systems
- Patent number 7,025,092
- Issue date Apr 11, 2006
- Studor S.A.
- John Swaffield
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
AIR PRESSURE ATTENUATION DEVICE
- Publication number 20190338879
- Publication date Nov 7, 2019
- HERIOT-WATT UNIVERSITY
- Michael Gormley
- E03 - WATER SUPPLY SEWERAGE
Information Patent Application
METHOD AND EQUIPMENT FOR DETECTING SEALING DEFICIENCIES IN DRAINAGE...
- Publication number 20100000298
- Publication date Jan 7, 2010
- HERIOT-WATT UNIVERSITY
- John Swaffield
- G01 - MEASURING TESTING
Information Patent Application
Sealed off building drainage and vent system
- Publication number 20060201088
- Publication date Sep 14, 2006
- STUDOR S.A.
- John A. Swaffield
- E03 - WATER SUPPLY SEWERAGE
Information Patent Application
Pressure relief device drainage systems
- Publication number 20040261870
- Publication date Dec 30, 2004
- John Swaffield
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...