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USPTO Patent Rankings Data through Dec 31, 2025
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Seikenkai — 6 Patents

Rank (All Time): #88,229 of 105,732Top 85%
3 inventors
6 Patents All Time

Patents per Year

Patents granted per year, 1980 to 1989Bar chart with a peak of 2 patents in 1982.peak 21980: 1 patents19801982: 2 patents19821988: 1 patents19881989: 2 patents1989

Top Inventors at Seikenkai All Time

Showing 1–3 of 3 inventors

RankNamePatents
1 Kosei Hata 6
2 Tadayo Hata 1
2 Toshiyuki Maruoka 1

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