TT

Toru Tagawa

NT NTT: 1 patents #2,911 of 4,871Top 60%
NI Nitsuko: 1 patents #31 of 78Top 40%
Overall (All Time): #3,972,857 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4660219 Extension ringing arrangement key telephone system Kinzi Tanaka, Yoshiji Tanimoto, Minoru Okumura 1987-04-21