SI

Seiko Igarashi

TK Toa Nenryo Kogyo: 2 patents #87 of 220Top 40%
📍 Sakado, JP: #79 of 173 inventorsTop 50%
Overall (All Time): #2,339,738 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
RE32792 Process for producing mesophase pitch Takayuki Izumi, Tsutomu Naito 1988-11-29
4533461 Process for producing mesophase pitch Takayuki Izumi, Tsutomu Naito 1985-08-06