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

Dual-Lite — 14 Patents

Rank (All Time): #40,750 of 105,732Top 40%
18 inventors
14 Patents All Time

Patents per Year

Patents granted per year, 1982 to 2001Bar chart with a peak of 6 patents in 2000.peak 61982: 1 patents19821983: 1 patents19831989: 1 patents19891991: 3 patents19912000: 6 patents20002001: 2 patents2001

Top Inventors at Dual-Lite All Time

Showing 1–18 of 18 inventors

RankNamePatents
1 Joseph S. Wegrzyn 8
2 Joseph M. LaRosa 4
3 Robert M. Johnstone 3
#4 David Evarts 2
#4 Jeff Holmes 2
#4 Milt Erickson 2
#4 Thomas K. Heaton 2
#8 Charles R. Ruskouski 1
#8 David G. Bragin 1
#8 Edward Kozek 1
#8 John E. Studer 1
#8 Richard Diachenko 1
#8 Richard L. Sieron 1
#8 Steven J. Altamura 1
#8 Stephen J. Ziff 1
#8 Willfred Goldschmidt 1
#8 Wiley Alan Kittrell 1
#8 William P. Shine 1

Most Valuable Patents

PatentEst. ValueYear
Modular wiring systems$102K1983

All 100 most valuable US patents →