DH

David V. Hefford

U.S. Philips: 3 patents #1,741 of 8,851Top 20%
📍 Esher, GB: #2 of 19 inventorsTop 15%
Overall (All Time): #1,615,641 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6377750 Heating apparatus comprising a plastics body and a planar heating element Gerald R. Scott 2002-04-23
6184509 Heating apparatus and heating element assembly method Gerald R. Scott 2001-02-06
5794520 Water heating vessel 1998-08-18