Hiroki Kitagawa
72Patents
14h-index
91Co-inventors
87Inventor score
Filing activity: Dec 30, 1985 → Jun 6, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5952639A | Depositing, withdrawal, balance check, exchange and transfer of electronic money in automatic cash handling machine | Physics | 204 | Expired |
| USD576749S1 | Fluorescent lamp | General | 89 | Expired |
| USD574093S1 | Fluorescent lamp | General | 81 | Expired |
| US6000607A | IC card reader/writer and method of operation thereof | Physics | 79 | Expired |
| US6032857A | Electronic money system | Physics | 71 | Expired |
| US5936220A | Electronic wallet and method of operation of the same | Physics | 69 | Expired |
| USD577138S1 | Fluorescent lamp | General | 36 | Expired |
| USD689866S1 | Scanner | General | 29 | Active |
| US6189783A | System for aiding in use of a facility arranged to equip visitors with portable information storing units, method for aiding in use of a facility, and recording medium for recording the method | Physics | 27 | Expired |
| USD405070S | IC card reader and writer | General | 26 | Expired |
| USD667467S1 | Air compressor | General | 23 | Active |
| US6339638B1 | Telephone used for electronic money card transaction and method of operation of the same | Physics | 22 | Expired |
| USD411524S | IC card reader and writer | General | 20 | Expired |
| US4707147A | Device for measuring plasma properties | Physics | 16 | Expired |
| US7490747B2 | Fastener driving tool including push lever configured to avoid inclined orientation of the driver fasteners | Performing Operations; Transporting | 13 | Active |
| USD432882S | Pneumatic nailing machine | General | 13 | Expired |
| US6888955B2 | Picture recognition apparatus and method | Physics | 12 | Expired |
| US7243831B2 | Fastener driving tool | Performing Operations; Transporting | 12 | Expired |
| US7299959B2 | Urged magazine for a fastener driving tool | Performing Operations; Transporting | 12 | Expired |
| US7441683B2 | Fastener driving tool | Performing Operations; Transporting | 10 | Expired |
| US7325709B2 | Fastener driving tool and magazine device | Performing Operations; Transporting | 9 | Expired |
| US6745928B2 | Trigger valve apparatus for pneumatic tool | Performing Operations; Transporting | 8 | Expired |
| USD519809S1 | Portable pneumatic nailer | General | 8 | Expired |
| US7014089B2 | Trigger valve apparatus for pneumatic tool | Performing Operations; Transporting | 8 | Expired |
| US8479963B2 | Pneumatic driving machine | Performing Operations; Transporting | 8 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.