ZAMA JAPAN KABUSHIKI KAISHA
78Patents
48Active
78Granted
45Portfolio score
Filing activity: Oct 24, 2000 → Apr 20, 2021 · 6 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6698727B1 | Electronic control diaphragm carburetor | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6591794B2 | Air-fuel ratio control system for a stratified scavenging two-cycle engine | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US6354251B1 | Air-fuel ratio control system for a stratified scavenging two-cycle engine | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US7913659B2 | Carburetor start system | Mechanical Engineering; Lighting; Heating | 12 | Active |
| US6702261B1 | Electronic control diaphragm carburetor | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6880812B2 | Carburetor | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6581916B1 | Electronic control diaphragm carburetor | Emerging Cross-Sectional Technologies | 10 | Expired |
| US8308144B2 | Diaphragm carburetor | Emerging Cross-Sectional Technologies | 9 | Active |
| US6662767B1 | Scavenging air/fuel-air mixture control device for a stratified scavenging two-cycle engine | Emerging Cross-Sectional Technologies | 7 | Expired |
| US8632057B2 | Diaphragm carburetor | Emerging Cross-Sectional Technologies | 7 | Active |
| US7722015B2 | Internal shape of rotor for two-bore rotary carburetor used in stratified scavenging engine | Emerging Cross-Sectional Technologies | 6 | Active |
| USD877582S1 | Socket wrench | General | 6 | Active |
| US6827338B2 | Scavenging air/fuel-air mixture control device for a stratified scavenging two-cycle engine | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6957633B2 | Carburetor for two-cycle engine | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7168423B2 | Gas sensor units for engines | Physics | 5 | Expired |
| US6631889B2 | Diaphragm-type carburetor | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7377496B2 | Carburetor for two-cycle engine | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6843469B1 | Scavenging air/fuel-air mixture control device for a stratified scavenging two-cycle engine | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7185623B2 | Carburetor start pump circuit | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6702262B2 | Fuel system of carburetor | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7104527B2 | Carburetor with manual choke mechanism | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6845972B2 | Fuel system of carburetor | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7309061B2 | Diaphragm-type carburetors | Emerging Cross-Sectional Technologies | 3 | Active |
| US7325791B2 | Carburetor for stratified scavenging two-cycle engine | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6799545B2 | Carburetor start pump circuit | Mechanical Engineering; Lighting; Heating | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.