DAIWA SEIKO CO., LTD.
612Patents
13Active
612Granted
45Portfolio score
Filing activity: Nov 26, 1975 → Jun 12, 2013 · 12 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6193614A | Golf club head | Human Necessities | 260 | Expired |
| US6056649A | Golf club head | Human Necessities | 236 | Expired |
| USD408485S | Golf club head | General | 221 | Expired |
| US5616088A | Golf club head | Human Necessities | 201 | Expired |
| US4811503A | Ski boot | Human Necessities | 179 | Expired |
| US5547194A | Golf club head | Human Necessities | 154 | Expired |
| US5697855A | Golf club head | Human Necessities | 127 | Expired |
| USD383819S | Golf club head | General | 84 | Expired |
| US7931542B2 | Golf club | Human Necessities | 80 | Active |
| US5643103A | Golf club set | Human Necessities | 72 | Expired |
| US5692693A | Backflash preventive device for preventing over rotation of a spool for a fishing reel | Human Necessities | 70 | Expired |
| US6402637B1 | Golf club head | Human Necessities | 68 | Expired |
| US5575723A | Golf club with cushion material between shaft and head | Human Necessities | 66 | Expired |
| US5816936A | Golf club head and method of manufacturing the same | Human Necessities | 63 | Expired |
| US6086005A | Fishing reel with magnetic force spool rotational-speed control during spool free rotational state | Human Necessities | 56 | Expired |
| US5396727A | Casting handle for fishing rod | Human Necessities | 51 | Expired |
| US5337134A | Sheet inverting unit and an imaging forming apparatus employing the same | Physics | 49 | Expired |
| US7445564B2 | Golf club head | Human Necessities | 48 | Expired |
| US5722609A | Traverse mechanism for a spinning reel | Human Necessities | 48 | Expired |
| US6926616B1 | Golf club head | Human Necessities | 48 | Expired |
| US6634958B1 | Golf club | Human Necessities | 46 | Expired |
| US4697758A | Fishing reel with microcomputer | Human Necessities | 45 | Expired |
| US5573469A | Gulf club head | Human Necessities | 43 | Expired |
| USD377381S | Golf club head | General | 41 | Expired |
| US6089990A | Set of iron clubs | Human Necessities | 39 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.