Itakura Soki
4Patents
0Active
4Granted
26Portfolio score
Filing activity: Aug 4, 1977 → Aug 17, 1990
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5052904A | Aquarium air pump | Human Necessities | 27 | Expired |
| US4886093A | Vent valve of an air pump | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4180377A | Valve element for an air pump | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4137016A | Valve mechanism for an air pump | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.