Skip to content
Patent Leaderboard
USPTO Patent Rankings
Data through Dec 31, 2025
Search
Companies
Universities
Inventors
Cities
States
Technologies
Top Patents
Inventor 500
Select ranking year
All Time
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1987
1986
1985
1984
1983
1982
1981
1980
Home
›
2021
›
Warsaw Orthopedic
›
James Duncan
JD
James Duncan
— 1 Patent in 2021
DM
Degen Medical
:
1
patents
#1
of
3
Top 35%
Hernando, MS
:
#8
of
14
inventors
Top 60%
Mississippi
:
#60
of
306
inventors
Top 20%
Overall
(2021):
#420,397
of
548,734
Top 80%
1
Patents 2021
Issued Patents
2021
Showing
1–1
of
1
patents
Patent #
Title
Co-Inventors
Date
11123198
Expandable spacers
Craig Black
2021-09-21
Nearby-Ranked Inventors
Jason J. DUNCAN-WILSON
1
James A. Duncan
1
Jacob Alan Duncan
1
Jason Duncan
1
Jan William Duncan
1
Jack Dumenil
1
James DULLAGHAN
1
Jacques Dugas
1
James Duffy
1