David Bernard Fox

EC English Electric Valve Co.: 1 patents #5 of 18Top 30%

Overall (1989): #123,257 of 140,708Top 90%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4810925	Directly heated cathodes	—	1989-03-07