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John Swaffield
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Edinburgh, GB
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Patents Grants
last 30 patents
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 Applications
last 30 patents
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...