Harmon Industries, LLC
21Patents
0Active
21Granted
33Portfolio score
Filing activity: Sep 23, 1974 → Nov 26, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5533695A | Incremental train control system | Performing Operations; Transporting | 116 | Expired |
| US5452870A | Fixed data transmission system for controlling train movement | Performing Operations; Transporting | 71 | Expired |
| US5340062A | Train control system integrating dynamic and fixed data | Performing Operations; Transporting | 63 | Expired |
| US5060890A | Detection of overheated railroad wheel and axle components | Performing Operations; Transporting | 34 | Expired |
| US5586736A | Cab signal sensor with noise suppression | Performing Operations; Transporting | 33 | Expired |
| US5149025A | Detection of overheated railroad wheel and axle components | Performing Operations; Transporting | 29 | Expired |
| US5628479A | Vital wheel detector | Performing Operations; Transporting | 25 | Expired |
| US7152733B2 | Spring-loaded folding grill cover device | Human Necessities | 23 | Expired |
| US3964704A | Operating mechanism for railroad crossing gate | Performing Operations; Transporting | 21 | Expired |
| US5769364A | Coded track circuit with diagnostic capability | Performing Operations; Transporting | 21 | Expired |
| US4934633A | Crossing control unit | Performing Operations; Transporting | 15 | Expired |
| US4928910A | Detection of overheated railroad wheel and axle components | Performing Operations; Transporting | 14 | Expired |
| US5170970A | Method and apparatus for improving rail shunts | Performing Operations; Transporting | 13 | Expired |
| US5924652A | Island presence detected | Performing Operations; Transporting | 12 | Expired |
| US5628478A | Cab signal pickup system with motor noise reduction | Performing Operations; Transporting | 12 | Expired |
| US6392553B1 | Signal interface module | Performing Operations; Transporting | 8 | Expired |
| US6064315A | Zero speed transducer | Performing Operations; Transporting | 8 | Expired |
| US4868538A | Random signature island circuit | Performing Operations; Transporting | 8 | Expired |
| US5507434A | Clamp mount for concrete ties | Fixed Constructions | 4 | Expired |
| US4026505A | Variable high pass coupler | Performing Operations; Transporting | 3 | Expired |
| US5436787A | Surge arrestor unit | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.