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USPTO Patent Rankings Data through Dec 31, 2025
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Hollrock Engineering — 7 Patents

Rank (All Time): #76,014 of 105,732Top 75%
2 inventors
7 Patents All Time

Patents per Year

Patents granted per year, 1987 to 1997Bar chart with a peak of 2 patents in 1994.peak 21987: 1 patents19871989: 1 patents19891993: 1 patents19931994: 2 patents19941997: 2 patents1997

Top Inventors at Hollrock Engineering All Time

Showing 1–2 of 2 inventors

RankNamePatents
1 J. Richard Hollrock 7
2 Richard H. Hollrock 3

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