Hakko Electric Machine Works Co., Ltd.
9Patents
0Active
9Granted
28Portfolio score
Filing activity: Apr 23, 1985 → Oct 3, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6110154A | Valve and valved trocar jacket tube | Human Necessities | 329 | Expired |
| US6077288A | Valved trocar jacket tube | Human Necessities | 303 | Expired |
| US6589167B1 | Valve and valved trocar jacket tube | Human Necessities | 283 | Expired |
| US4846799A | Set of double needles for injecting liquid medicine | Human Necessities | 103 | Expired |
| US5026350A | Set of double needles for injecting liquid medicine | Human Necessities | 69 | Expired |
| US4643196A | Biopsy needle set | Human Necessities | 50 | Expired |
| US5505211A | Biopsy needles | Human Necessities | 28 | Expired |
| US6471711B2 | Device for guiding puncture needle | Human Necessities | 4 | Expired |
| US5209239A | Apparatus for cystographic inspection | Human Necessities | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.