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

Sewell Plastics — 28 Patents

Rank (All Time): #21,507 of 105,732Top 25%
24 inventors
28 Patents All Time

Patents per Year

Patents granted per year, 1980 to 1991Bar chart with a peak of 6 patents in 1991.peak 61980: 1 patents19801981: 1 patents1982: 2 patents19821983: 2 patents1984: 2 patents19841985: 2 patents1986: 4 patents19861987: 1 patents1989: 2 patents19891990: 5 patents1991: 6 patents1991

Top Inventors at Sewell Plastics All Time

Showing 1–24 of 24 inventors

RankNamePatents
1 Alfred C. Alberghini 14
2 Stephen R. Lynn 6
3 David A. Brunson 5
3 Gerhard E. B. Nickel 5
#5 Burnis L. Hunter 2
#5 Charles M. Brandt 2
#5 Donald P. Denhoff 2
#5 Gary R. Hill 2
#5 Gene A. Herron 2
#5 Michael Warkentien 2
#5 Walter K. Schoch 2
#12 Benn C. Walton 1
#12 Brian C. McPike 1
#12 David A. Deemer 1
#12 Dennis C. Donalson 1
#12 George AUSTIN 1
#12 Geoffrey Alan Long 1
#12 Marc W. Roth 1
#12 Robert E. Frankenberg 1
#12 Steve R. Lynn 1
#12 Sterling Lane Steward 1
#12 William J. Peek 1
#12 Claude J. Everette 1
#12 Mark A. Calderazzo 1