High Vacuum Valve Co: Difference between revisions
From Graces Guide
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1930-33 [[Paul Freedman]] was MD | 1930-33 [[Paul Freedman]] was MD | ||
1935 Patent to the company and Donovan William Sayers for a portable wireless receiver | |||
Name changed to [[Hivac]]. | Name changed to [[Hivac]]. | ||
Revision as of 08:15, 11 July 2022
of Farringdon Road, London
Previously Freedman Valve Co
1930-33 Paul Freedman was MD
1935 Patent to the company and Donovan William Sayers for a portable wireless receiver
Name changed to Hivac.
See Also
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