Masao Katooka
24Patents
11h-index
27Co-inventors
75Inventor score
Filing activity: Feb 2, 1978 → Jun 1, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5424915A | Cooling structure for power supply device | Electricity | 86 | Expired |
| USD386148S | Portable power supply unit with AC-DC converter | General | 70 | Expired |
| US5831240A | Power supply apparatus | Performing Operations; Transporting | 44 | Expired |
| US6051806A | Power supply apparatus for welders and method of manufacturing same | Performing Operations; Transporting | 39 | Expired |
| USD377335S | Portable power supply unit with AC-DC converter | General | 33 | Expired |
| US6665183B1 | Power supply apparatus | Electricity | 33 | Expired |
| US6825441B2 | Power supply apparatus | Performing Operations; Transporting | 25 | Expired |
| US6774757B2 | Coil | Electricity | 25 | Expired |
| US6636140B2 | High-frequency large current handling transformer | Electricity | 18 | Expired |
| USD474738S1 | Power supply apparatus | General | 13 | Expired |
| US5943220A | Waterproofed power supply apparatus | Electricity | 12 | Expired |
| US6483687B2 | Power supply apparatus | Performing Operations; Transporting | 9 | Expired |
| US5757638A | Power supply apparatus | Electricity | 8 | Expired |
| US5726416A | Air plasma arc cutter | Performing Operations; Transporting | 8 | Expired |
| US7315450B2 | Heat-generating component cooling structure | Electricity | 7 | Expired |
| US6057524A | Plasma arc utilizing apparatus | Electricity | 7 | Expired |
| US6433664B1 | Coil | Electricity | 6 | Expired |
| US7339807B2 | Power supply apparatus | Electricity | 4 | Active |
| US6797922B2 | Power supply apparatus for welder | Performing Operations; Transporting | 3 | Expired |
| US4214356A | Artificial porcelain tooth manufacturing | Emerging Cross-Sectional Technologies | 2 | Expired |
| US7902464B2 | Heat sink arrangement for electrical apparatus | Electricity | 1 | Active |
| US7579554B2 | Heat sink arrangement for electrical apparatus | Electricity | 0 | Active |
| US7256994B2 | Power supply apparatus | Electricity | 0 | Expired |
| US7300293B2 | Attachment for preventing cover from falling off | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.