Hajime Ohta
16Patents
7h-index
31Co-inventors
66Inventor score
Filing activity: Jun 24, 1976 → Feb 3, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6463360B1 | Mobile robot, automated production system, and mobile robot system | Emerging Cross-Sectional Technologies | 141 | Expired |
| US4670751A | Eraser for electronic blackboard | Physics | 69 | Expired |
| US5665120A | Biomedical material including tube-like biodegradeable nety works filled with hydroxylapatite | Human Necessities | 29 | Expired |
| US4087761A | Audio power amplifier | Electricity | 15 | Expired |
| US4798969A | Power feed system in transmission line between terminals of three-terminal station | Electricity | 10 | Expired |
| US4564078A | Apparatus for storing felt pens for an electronic board | Performing Operations; Transporting | 10 | Expired |
| USD310509S | Portable battery case | General | 7 | Expired |
| US4159493A | Combined magnetic head having recording and playback cores | Physics | 7 | Expired |
| US7863343B2 | Expandable polylactic acid resin particles, expanded polylactic acid resin beads and molded article obtained from expanded polylactic acid resin beads | Chemistry; Metallurgy | 6 | Active |
| USD307232S | Cordless electric pruner | General | 6 | Expired |
| US4333114A | Recording circuit employing AC biasing system | Physics | 1 | Expired |
| US12202951B2 | Modified expanded bead and foam molded article of expanded beads | Chemistry; Metallurgy | 0 | Active |
| US6522044B1 | Disc-type commutator for electric rotating machine | Electricity | 0 | Expired |
| US11732101B2 | Polypropylene-based resin expanded beads and polypropylene-based resin expanded beads molded article | Chemistry; Metallurgy | 0 | Active |
| US11904579B2 | Molded article of polypropylene-based resin foamed particle molded body, polypropylene-based resin foamed particle, and method for producing same | Chemistry; Metallurgy | 0 | Active |
| US12240956B2 | Expanded bead and method for producing the same | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.