39 Utility Patents
#10 in Otawara
#12,015 in Japan
#55,997 in the World
Forward Citations = 268
Company Filing History:
Canon Electron Tubes & Devices Co., Ltd.
4. 2 out of 2
Toshiba Electron Tubes & Devices
5. 1 out of 2,916
where one patent can have more than one assignee
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