WALBRO LLC
380Patents
107Active
380Granted
48Portfolio score
Filing activity: Oct 21, 1974 → May 10, 2024 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5044344A | Pressure-responsive fuel delivery system | Emerging Cross-Sectional Technologies | 106 | Expired |
| US4926829A | Pressure-responsive fuel delivery system | Emerging Cross-Sectional Technologies | 76 | Expired |
| US5195494A | Fuel delivery system with outlet pressure regulation | Emerging Cross-Sectional Technologies | 74 | Expired |
| US4649884A | Fuel rail for internal combustion engines | Mechanical Engineering; Lighting; Heating | 70 | Expired |
| US5398655A | Manifold referenced returnless fuel system | Mechanical Engineering; Lighting; Heating | 69 | Expired |
| US6447270B1 | Brushless coolant pump and cooling system | Electricity | 68 | Expired |
| US5148792A | Pressure-responsive fuel delivery system | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5579740A | Fuel handling system | Mechanical Engineering; Lighting; Heating | 65 | Expired |
| US5361742A | Fuel pump manifold | Mechanical Engineering; Lighting; Heating | 64 | Expired |
| US5623907A | Liquid propane fuel delivery system | Emerging Cross-Sectional Technologies | 62 | Expired |
| US5984281A | Carburetor needle valve and limiter cap installation and adjustment apparatus | Emerging Cross-Sectional Technologies | 61 | Expired |
| US5611312A | Carburetor and method and apparatus for controlling air/fuel ratio of same | Mechanical Engineering; Lighting; Heating | 57 | Expired |
| US5727529A | Pressure control valve for a fuel system | Mechanical Engineering; Lighting; Heating | 56 | Expired |
| US4747388A | In-tank fuel reservoir and filter diaphragm | Emerging Cross-Sectional Technologies | 54 | Expired |
| US5647329A | In-tank fuel pump and reservoir | Emerging Cross-Sectional Technologies | 51 | Expired |
| US6302144A | Vehicle fuel system | Emerging Cross-Sectional Technologies | 50 | Expired |
| US5415146A | Supplemental in-tank filter | Emerging Cross-Sectional Technologies | 49 | Expired |
| US5265644A | Fuel pressure regulator | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5702229A | Regenerative fuel pump | Mechanical Engineering; Lighting; Heating | 48 | Expired |
| US5368001A | Fuel handling system | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4569637A | In-tank fuel pump assembly | Mechanical Engineering; Lighting; Heating | 47 | Expired |
| US5038741A | In-tank fuel module | Emerging Cross-Sectional Technologies | 46 | Expired |
| US5960775A | Filtered fuel pump module | Performing Operations; Transporting | 46 | Expired |
| US6231318A | In-take fuel pump reservoir | Mechanical Engineering; Lighting; Heating | 46 | Expired |
| US5647331A | Liquid cooled fuel pump and vapor separator | Mechanical Engineering; Lighting; Heating | 44 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.