3 Patents
#3,271 in Tokyo
#8,780 in Japan
Kabushiki Kaisha Sigma
Forward Citations = 84
5 inventors:
5 inventors (with patents filed for the assignee):
Kouichi Iimura (2 out of 2 patents)
Shunichi Nakamura (1 out of 7 patents)
Kikuo Nakamura (1 out of 3 patents)
4. Katsuki Manabe (1 out of 4 patents)
5. Susumu Ozawa (1 out of 2 patents)
3 patents: