Kazutoshi Ohta
19Patents
8h-index
12Co-inventors
69Inventor score
Filing activity: Nov 3, 1976 → Mar 2, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4570753A | Elevator hoisting device | Performing Operations; Transporting | 35 | Expired |
| US7424145B2 | Device and method for inspecting photomasks and products fabricated using the same | Physics | 35 | Expired |
| US4465161A | Elevator winding device | Performing Operations; Transporting | 17 | Expired |
| US4079816A | Damper device for elevator rope | Performing Operations; Transporting | 16 | Expired |
| US4666743A | Method for manufacturing a decorative sheet | Performing Operations; Transporting | 13 | Expired |
| US4219995A | Wire rope | Textiles; Paper | 12 | Expired |
| US4434873A | Electric elevator car driving device | Performing Operations; Transporting | 12 | Expired |
| US4460066A | Crime prevention apparatus for elevators | Performing Operations; Transporting | 9 | Expired |
| US4515248A | Buffer device for elevator | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4226078A | Wire rope | Textiles; Paper | 7 | Expired |
| US4734745A | Method for projecting and exposing a photomask pattern onto re-exposing substrates and its apparatus | Physics | 6 | Expired |
| US8633543B2 | Electro-static discharge protection circuit and semiconductor device | Electricity | 5 | Active |
| US6745484B2 | Reticle, and pattern positional accuracy measurement device and method | Electricity | 5 | Expired |
| US4433023A | Panel for elevator | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6708323B2 | Method and apparatus for verifying mask pattern data according to given rules | Physics | 4 | Expired |
| US4172509A | Traction machine of elevator | Performing Operations; Transporting | 3 | Expired |
| US4653611A | Elevator control apparatus | Performing Operations; Transporting | 3 | Expired |
| US6361908B1 | Layout designing method of a display device | Physics | 1 | Expired |
| US6461777B1 | Layout designing method of a display device | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.