SANGO CO., LTD.
70Patents
33Active
70Granted
45Portfolio score
Filing activity: Aug 16, 1974 → Mar 5, 2021 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6834245B2 | Method and apparatus for monitoring the status of manufacturing products | Emerging Cross-Sectional Technologies | 44 | Expired |
| US5713611A | Connection of a plate and tubular members | Emerging Cross-Sectional Technologies | 40 | Expired |
| US6769281B2 | Method and apparatus of producing a columnar member container | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6381843B1 | Method of producing a catalytic converter | Emerging Cross-Sectional Technologies | 29 | Expired |
| US6233993A | Method and apparatus for forming a processed portion of a workpiece | Performing Operations; Transporting | 22 | Expired |
| US6216512A | Method and apparatus for forming a processed portion of a workpiece | Performing Operations; Transporting | 22 | Expired |
| US6386010B1 | Spinning processing method and apparatus therefor | Performing Operations; Transporting | 21 | Expired |
| US6588203B2 | Exhaust device of internal combustion engine | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4971166A | Muffler | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US6067833A | Method and apparatus for forming an end portion of a cylindrical member | Performing Operations; Transporting | 18 | Expired |
| US6018972A | Method and apparatus for forming an end portion of a cylindrical member | Performing Operations; Transporting | 15 | Expired |
| US7527126B2 | Exhaust apparatus of an internal combustion engine | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6591498B2 | Method of producing a catalytic converter | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6530256B1 | Method and device for expanding tube material | Performing Operations; Transporting | 13 | Expired |
| USD452694S1 | Catalytic converter | General | 13 | Expired |
| US5259300A | Stirrer for food and cooking method | Performing Operations; Transporting | 13 | Expired |
| US4177875A | Muffler for internal combustion engine | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6027146A | Merging pipe and method of manufacturing same | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US7111392B2 | Method of producing a fragile substrate container | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7505504B2 | Laser processing device | Performing Operations; Transporting | 10 | Expired |
| US5943891A | Silencer shell forming apparatus | Performing Operations; Transporting | 9 | Expired |
| US7174634B2 | Method for producing a fluid treatment device having a honeycomb member | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6427802B1 | Muffler | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6102154A | Muffler | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6223434A | Muffler and its manufacturing method | Emerging Cross-Sectional Technologies | 6 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.