Patents per Year
Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6721683 | Pump system diagnosis | Casey Alexander Harris, Jeffrey A. Schibonski, Dal L. Wheeler | 2004-04-13 | |
| 5226370 | Transit car door system and operation | Robert F. Carter, David L. Crawforth | 1993-07-13 | $4,921,000 |
| 5119739 | Transit car door system and operation | Robert F. Carter, David L. Crawforth | 1992-06-09 | $3,258,000 |
| 4981084 | Transit car door system and operation | Robert F. Carter, David L. Crawforth | 1991-01-01 | |
| 4658346 | Apparatus for co-generation of electric power | — | 1987-04-14 |