Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Sigma Systems — 7 Patents

Rank (All Time): #75,200 of 106,120Top 75%
11 inventors
7 Patents All Time

Top Inventors at Sigma Systems All Time

Showing 1–11 of 11 inventors

RankNamePatents
1 Charles M. Blackburn 3
1 Clifton W. Heffner 3
1 Daniel L. Reuter 3
1 Philip L. Reid 3
1 Robert T. Stewart 3
#6 Atsusi Nakamura 1
#6 Hajime Asama 1
#6 Hayato Kaetsu 1
#6 Isao Endo 1
#6 Sakae Miyao 1
#6 Shin-ya Kotosaka 1