Farr Company
11Patents
0Active
11Granted
31Portfolio score
Filing activity: May 5, 1978 → Jan 28, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4322231A | Filter element locking mechanism | Performing Operations; Transporting | 156 | Expired |
| US5512074A | Air filter assembly | Emerging Cross-Sectional Technologies | 139 | Expired |
| US5223011A | Air filter assembly | Performing Operations; Transporting | 103 | Expired |
| US4365980A | Air filter assembly | Emerging Cross-Sectional Technologies | 65 | Expired |
| US4177050A | Air filter assembly | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5972059A | Air filter assembly | Performing Operations; Transporting | 30 | Expired |
| US4786293A | Smart controller for reverse pulse air filter | Performing Operations; Transporting | 29 | Expired |
| US4319897A | Air filter assembly including an improved jet pump cleaning apparatus | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4499733A | Emergency shutdown mechanism for a turbocharged diesel engine | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4659466A | Quick release cover assembly for a liquid filter housing | Performing Operations; Transporting | 17 | Expired |
| US4865636A | Interlocking wedge for pleated paper filter element | Performing Operations; Transporting | 16 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.