SJ

Spencer Dale Johnson

AG Agco: 3 patents #101 of 399Top 30%
UC Union Tank Car: 2 patents #10 of 34Top 30%
📍 Chicago, IL: #2,537 of 13,327 inventorsTop 20%
🗺 Illinois: #17,877 of 84,256 inventorsTop 25%
Overall (All Time): #931,294 of 4,157,543Top 25%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
12024126 Ladder systems, agricultural vehicles, and related methods Mark Aron Crowley 2024-07-02
11634082 Ladder systems, agricultural vehicles, and related methods Mark Aron Crowley 2023-04-25
11332076 Ladder systems, agricultural vehicles, and related methods Mark Aron Crowley 2022-05-17
10464580 Railroad tank car manway assembly Dan Schmidt, Gary C. Walter 2019-11-05
10029705 Railroad tank car manway assembly Dan Schmidt, Gary C. Walter 2018-07-24