Luwa, Inc.
50Patents
0Active
50Granted
36Portfolio score
Filing activity: Dec 3, 1971 → Mar 11, 2005
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4501498A | Method and apparatus for extruding thermoplastic material | Performing Operations; Transporting | 38 | Expired |
| US5122315A | Method and appparatus for monitoring and controlling thermoplastic extruder output | Performing Operations; Transporting | 29 | Expired |
| US4471963A | Sealing member for rotating shaft and method of sealing therewith | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4191358A | Shutoff device | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4154587A | Gas filter element and method of manufacturing the same | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4321106A | Method of and apparatus for the thermal treatment of flowable material | Performing Operations; Transporting | 11 | Expired |
| US4045194A | Apparatus for cleaning air | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4090857A | Filter box for textile machines, especially a spinning machine | Textiles; Paper | 10 | Expired |
| US4199333A | Filter box for textile machines | Performing Operations; Transporting | 9 | Expired |
| US4357793A | Sliver-processing frame having drawing rollers | Textiles; Paper | 9 | Expired |
| US4226678A | Method and apparatus for the decontamination of a liquid containing contaminants | Physics | 8 | Expired |
| US4318206A | Coiler arrangement | Performing Operations; Transporting | 8 | Expired |
| US4158444A | Method and apparatus for connecting a yarn and for forming a yarn reserve at a bobbin tube | Performing Operations; Transporting | 8 | Expired |
| US5187316A | Passive explosion protection device | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4389931A | Apparatus for the compaction of fibers | Textiles; Paper | 7 | Expired |
| US4154798A | Apparatus for producing a homogeneous, chemically reactive system | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5666996A | Forced air cleaning system for textile machines | Textiles; Paper | 7 | Expired |
| US4446781A | Apparatus for the mechanical/thermal treatment, including sterilization and pasteurization, of fluids | Human Necessities | 7 | Expired |
| US4329840A | Method of and apparatus for feeding a fibre tow to a textile machine | Performing Operations; Transporting | 6 | Expired |
| US3969194A | Method and apparatus for the purification of a liquid contaminated with radioactive substances | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4382401A | Air distribution apparatus, especially for oversaturated air | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4768443A | Working apparatus, especially a cleaning apparatus used in conjunction with a textile machine | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4900179A | Mounting cross-piece assembly and mounting cross-piece thereof | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4031951A | Air climatizing device | Emerging Cross-Sectional Technologies | 5 | Expired |
| US3968936A | Air outlet apparatus | Mechanical Engineering; Lighting; Heating | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.