Patent Leaderboard
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
Search
Companies
Inventors
RF
Roy Christopher Fonseca
PS
Progress Rail Services
: 1 patents #7 of 18
Top 40%
Overall (2016):
#249,633
of 481,213
Top 55%
1
Patents 2016
Issued Patents
2016
Profile Widget
Patent #
Title
Co-Inventors
Date
9415781
Dual engine locomotive
W. Jack Hardin
,
Walter E. Earleson
2016-08-16
×
Your Patent Widget
Preview how it looks, then copy the embed code to add it to your website.
Embed Code
<iframe src="https://www.patentleaderboard.com/widget/inventor/1319907" width="100%" height="400" frameborder="0" style="border:none;border-radius:12px;display:block;"></iframe>
Copy Embed Code