Berthold Frank — 1 Patent at U.S. Philips

Berthold Frank has been granted 1 US patent while listed as an inventor at U.S. Philips. All of these patents were granted in 1985. Berthold Frank ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Berthold Frank in Aachen, DE.

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Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
4533852	Method of manufacturing a thermionic cathode and thermionic cathode manufactured by means of said method	Georg Gartner, Hans Lydtin	1985-08-06	$577,000

Berthold Frank — 1 Patent

Issued Patents All Time

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