Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Williams Electronics Games › Mark D. Ritchie
MR

Mark D. Ritchie — 6 Patents

WGWilliams Electronics Games: 4 patents #16 of 63Top 30%
CCCapcom Coin-Op: 2 patents #4 of 14Top 30%
Carol Stream, IL: #63 of 346 inventorsTop 20%
Illinois: #15,248 of 84,256 inventorsTop 20%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Mark D. Ritchie has been granted 6 US patents while listed as an inventor at Williams Electronics Games. The first was granted in 1992 and the most recent in August 1997. Mark D. Ritchie ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Mark D. Ritchie in Carol Stream, IL, US.

Patents per Year

Patents granted per year, 1992 to 1997Bar chart with a peak of 2 patents in 1992.peak 21992: 2 patents19921994: 1 patents19941995: 1 patents19951996: 1 patents19961997: 1 patents1997

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
5655770 Pinball solenoid power control system William Pfutzenreuter 1997-08-12
5497989 Ball trough for pinball games Ming D. Zhang, Robert S. Morrison 1996-03-12
5405144 Tilting play feature for a pinball game John W. Skalon 1995-04-11
5322283 Rotary ball receptacle for a pinball game John W. Skalon 1994-06-21
5149093 Amusement device with trading card dispenser Winston H. Schilling, John R. Krutsch, Joseph Joos 1992-09-22
5137278 Amusement device with trading card dispenser Winston H. Schilling, John R. Krutsch, Joseph Joos 1992-08-11

Frequent Collaborators

John R. Krutsch2 shared
Winston H. Schilling2 shared
John W. Skalon2 shared
Joseph Joos2 shared
Robert S. Morrison1 shared
Ming D. Zhang1 shared

Nearby-Ranked Inventors

Aurélien Joulia6
Michael F. Vollero6
Stefano Fracassi6
Uwe Gruenbeck6
Alexander Matrosov6
Rouzbeh Behnia6
Carole Chapelat6
Mina Sedaghat6
Martinus Johannes Donatus Brakkee6