Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8321438 | Integration layer for a data repository | Mark Walters, Hans Dirk Schumacher, Mari Anne Kawaguchi, Daniel Douglas Grace, W. Keith Gordon +2 more | 2012-11-27 |
| 5760821 | Electronic program guide schedule localization system and method | Michael D. Ellis, Constance J. Borges, Rose A. Reynolds, Dennis Tenney | 1998-06-02 |
| D365977 | Trimmer line rewinder | — | 1996-01-09 |
| 4878638 | Combination frequency loop coupling for railway track signalling | James R. Hoelscher, Klaus H. Frielinghaus, Frank A. Raso | 1989-11-07 |
| 4550819 | Coin apparatus | — | 1985-11-05 |
| 4512454 | Coin apparatus having coin escrow and return means | James T. Schuller, Paul K. Griner | 1985-04-23 |
| 4498650 | Microprocessor based track circuit for occupancy detection and bidirectional code communication | James R. Hoelscher, William A. Petit | 1985-02-12 |
| 4451018 | Non contact isolated current detector | William A. Petit | 1984-05-29 |
| 4352475 | Audio frequency track circuit for rapid transit applications with signal modulation security | James R. Hoelscher | 1982-10-05 |
| 4257436 | Coin dispensing apparatus having a U-shaped coin ejector | — | 1981-03-24 |