Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
PI

Polymer Processing Research Inst. — 15 Patents

Rank (All Time): #38,859 of 106,120Top 40%
23 inventors
15 Patents All Time

Top Inventors at Polymer Processing Research Inst. All Time

Showing 1–23 of 23 inventors

RankNamePatents
1 Hiroshi Yazawa 13
1 Kazuhiko Kurihara 13
3 Shuichi Murakami 5
3 Yoichi Mazawa 5
#5 Jun Yamada 4
#5 Kintaro Aihara 4
#5 Toshikazu Ohishi 4
#5 Yuki Kuroiwa 4
#9 Sadayuki Ishiyama 3
#9 Toshikazu Oishi 3
#11 Tadashi Honda 2
#11 Yukio Matsumura 2
#13 Akihide Kurata 1
#13 Hirotsune Okada 1
#13 Hideyo Rohyama 1
#13 Katsuaki Wakahara 1
#13 Kazuhiro Yabe 1
#13 Masato Kimura 1
#13 Masashi Kobayashi 1
#13 Shigezou Kojima 1
#13 Shin'ichi Umejima 1
#13 Shinji Yamazaki 1
#13 Tsutomu Matsuzaki 1