Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DJ

David W. Daugherty, Jr. — 45 Patents

HGHigher Ground: 5 patents #9 of 17Top 55%
WBWestinghouse Air Brake: 5 patents #37 of 284Top 15%
SISargent Industries: 3 patents #6 of 19Top 35%
WHWabtec Holding: 2 patents #49 of 164Top 30%
CJCj: 1 patents #101 of 175Top 60%
Zeeland, MI: #9 of 350 inventorsTop 3%
Michigan: #1,106 of 86,293 inventorsTop 2%
Overall (All Time): #65,084 of 4,157,543Top 2%
45 Patents All Time

Issued Patents All Time

Showing 26–45 of 45 patents

Patent #TitleCo-InventorsDate
5979679 Method for installing a locking wedge and carrier plate assembly Michael E. Ring, Scott Natschke 1999-11-09
5794536 End design for a railway type freight car Staffan Brandt 1998-08-18
5590797 Friction clutch mechanism for high capacity draft gear assembly and method of reconditioning draft gear with such friction clutch mechanism James L. Duffy, Wajih Kanjo, Rudi E. George 1997-01-07
5560503 Lubricating apparatus for articulated coupling arrangement 1996-10-01
5558238 Freight railway car slackless drawbar assembly 1996-09-24
5544767 Freight railway car slackless drawbar assembly 1996-08-13
5462179 Slackless drawbar assembly using a ball and race assembly at each end of the drawbar Wajih Kanjo, Michael G. Hawryszkow 1995-10-31
5277323 Locking wedge assembly to removably secure a male connection member in an articulated-type coupling arrangement William D. Wallace, Edward G. Lynch, Jr., Wajih Kanjo, Michael G. Hawryszkow 1994-01-11
5271511 Removable shaft member engageable in a ball portion of articulated bearing assembly Wajih Kanjo, Michael G. Hawryszkow 1993-12-21
5219082 Male connection member for an articulated coupling arrangement Wajih Kanjo, Michael G. Hawryszkow, William D. Wallace, Edward G. Lynch, Jr. 1993-06-15
5172820 Female connection member used in an articulated coupling arrangement 1992-12-22
5167333 Apparatus to prevent detrimental extraneous foreign matter from entering a cavity formed at an outer end of a female connection member of an articulated coupling Michael G. Hawryszkow, William D. Wallace, Wajih Kanjo 1992-12-01
5167334 Apparatus to provide versatility in securing male and female connection members of an articulated coupler to a center sill member of a railway car Wajih Kanjo, Michael G. Hawryszkow, William D. Wallace 1992-12-01
5139159 Connecting pin for articulated coupling arrangement Wajih Kanjo, Michael G. Hawryszkow, William D. Wallace, Edward G. Lynch, Jr. 1992-08-18
5131331 Articulated coupling apparatus for connecting adjacent ends of a pair of railway cars Edward G. Lynch, Jr., Wajih Kanjo, Michael G. Hawryszkow, William D. Wallace 1992-07-21
5115927 Strengthening mechanism for a female articulated coupling member for providing additional strength in response to loads exerted at bearing assembly connection shaft William D. Wallace, Edward G. Lynch, Jr., Wajih Kanjo, Michael G. Hawryszkow 1992-05-26
5105955 Spherical connector apparatus in an articulated slackless-type coupler arrangement used in a railway application Michael G. Hawryszkow, William D. Wallace, Edward G. Lynch, Jr., Wajih Kanjo 1992-04-21
5080243 Assembly mechanism for an articulated coupling system Edward G. Lynch, Jr., Wajih Kanjo, Michael G. Hawryszkow, William D. Wallace 1992-01-14
5065679 Articulated coupling apparatus for connecting adjacent ends of a pair of railway cars together in a semipermanent manner William D. Wallace, Edward G. Lynch, Jr., Wajih Kanjo, Michael G. Hawryszkow 1991-11-19
5042393 Locking assembly to secure a bearing assembly in an articulated coupling apparatus for connecting adjacent ends of a pair of railway cars Wajih Kanjo, Michael G. Hawryszkow, William D. Wallace, Edward G. Lynch, Jr. 1991-08-27