Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9145724 | Floor-mounting gate-closer post with rotary dampener | Simon David Dudley | 2015-09-29 |
| 8807605 | Bi-swing warehouse door latch system | Simon David Dudley, Peter B. Dudley | 2014-08-19 |
| 8186729 | Traplock for bi-swing gate | — | 2012-05-29 |
| 6739347 | System for spin-cleaning closed-end filter cartridges | Joseph D. Robertson | 2004-05-25 |
| 6681525 | Handicapped train-station gate | — | 2004-01-27 |
| 6569218 | Self spin-cleaning canister vacuum | — | 2003-05-27 |
| 6309328 | Exercise device | — | 2001-10-30 |
| 6156213 | Embedded spin-clean cartridge-type water filters | Joseph D. Robertson | 2000-12-05 |
| 5989419 | Spinner for cleaning cartridge-type water filters | Joseph D. Robertson | 1999-11-23 |
| 5388682 | Diverter for diverting articles transported along a conveyor belt | — | 1995-02-14 |
| 5135101 | Diverter of articles on conveyor | — | 1992-08-04 |
| 4458894 | Portable support bar assembly | — | 1984-07-10 |