AMF GmbH
298Patents
1Active
298Granted
42Portfolio score
Filing activity: Oct 29, 1973 → May 11, 2009 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4473474A | Charge modified microporous membrane, process for charge modifying said membrane and process for filtration of fluid | Performing Operations; Transporting | 121 | Expired |
| US4384474A | Method and apparatus for testing and using membrane filters in an on site of use housing | Performing Operations; Transporting | 103 | Expired |
| US4334544A | Ear lobe clip with heart beat sensor | Human Necessities | 94 | Expired |
| US4251988A | Defrosting system using actual defrosting time as a controlling parameter | Mechanical Engineering; Lighting; Heating | 93 | Expired |
| US4007113A | Particulate filter medium and process | Performing Operations; Transporting | 87 | Expired |
| US4305782A | Filter and method of making same | Performing Operations; Transporting | 79 | Expired |
| US4533634A | Tissue culture medium | Emerging Cross-Sectional Technologies | 77 | Expired |
| US4309247A | Filter and method of making same | Textiles; Paper | 75 | Expired |
| US4007114A | Fibrous filter medium and process | Performing Operations; Transporting | 70 | Expired |
| US4636949A | Method and apparatus for controlling cooking cycles in a cooking system | Physics | 67 | Expired |
| US4275882A | Home exercise gym | Human Necessities | 64 | Expired |
| US4395887A | Defrost control system | Mechanical Engineering; Lighting; Heating | 63 | Expired |
| US4512897A | Molecular separation column and use thereof | Physics | 57 | Expired |
| US3990425A | Compound bow | Emerging Cross-Sectional Technologies | 57 | Expired |
| US4483922A | Inactivation of enzymes | Physics | 57 | Expired |
| US4300759A | Inflatable aquatic exerciser | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4144895A | Solvent extraction process | Human Necessities | 55 | Expired |
| US4336036A | Filter and method of making same | Human Necessities | 54 | Expired |
| US4384957A | Molecular separation column and use thereof | Physics | 54 | Expired |
| US4366068A | Filter and method of making same | Performing Operations; Transporting | 51 | Expired |
| US4082673A | Filter asembly with integral service shut-off valve | Performing Operations; Transporting | 51 | Expired |
| US3958551A | Compound bow | Mechanical Engineering; Lighting; Heating | 51 | Expired |
| US4077876A | Shut-off valve apparatus | Performing Operations; Transporting | 49 | Expired |
| US4053056A | Cigarette package inspection apparatus | Performing Operations; Transporting | 49 | Expired |
| US4244021A | Ergometric exerciser | Emerging Cross-Sectional Technologies | 48 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.