DENYO CO., LTD.
36Patents
6Active
36Granted
40Portfolio score
Filing activity: Aug 19, 1975 → Mar 18, 2014 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD475726S1 | Engine-driven welding machine | General | 103 | Expired |
| US5796190A | Engine-driven permanent magnetic type welding generator | Electricity | 39 | Expired |
| US5052816A | Junction inspection method and apparatus for electronic parts | Physics | 39 | Expired |
| US6491133B2 | Soundproof type engine driven work machine | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| USD575733S1 | Engine generator | General | 34 | Expired |
| US5575349A | Soundproof type water-cooled engine generator | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US5250809A | Method and device for checking joint of electronic component | Physics | 33 | Expired |
| US5828152A | Rotor with permanent magnet of generator and method of manufacturing the same | Electricity | 30 | Expired |
| USD534863S1 | Engine-driven generator | General | 26 | Expired |
| USD480359S1 | Engine generator | General | 25 | Expired |
| USD503381S1 | Engine generator | General | 23 | Expired |
| US5637246A | Engine driven arc welder | Performing Operations; Transporting | 19 | Expired |
| US5936320A | Engine-driven permanent magnetic type welding generator | Electricity | 18 | Expired |
| US5708254A | Engine driven ARC welder | Performing Operations; Transporting | 16 | Expired |
| USD571292S1 | Engine generator | General | 9 | Expired |
| US6006418A | Method of manufacturing a rotors with permanent magnet | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7080611B2 | Engine-driven work machine | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| USD384033S | Engine-driven electric generator for welding | General | 9 | Expired |
| US7736129B2 | Cooling fan for rotating machine | Electricity | 8 | Active |
| US8987638B2 | Engine driven welding machine | Performing Operations; Transporting | 8 | Active |
| USD515030S1 | Engine-driven generator | General | 8 | Expired |
| US4539486A | Single-core inductor generator for welding producing multiple, mutually-independent outputs | Performing Operations; Transporting | 8 | Expired |
| US6040556A | Engine driven arc welder | Performing Operations; Transporting | 7 | Expired |
| US4268788A | A.C. Generator exciting method | Electricity | 7 | Expired |
| US7198245B2 | Engine-driven work machine | Emerging Cross-Sectional Technologies | 7 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.