FT

Fumio Tsutsumi

TC Tie Communications: 1 patents #16 of 33Top 50%
Overall (All Time): #4,104,935 of 4,157,543Top 100%
1
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Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4185173 Key telephone call signalling circuit Stephen E. Kerman, Fumikazu Hamatani, Yuji Tanaka 1980-01-22