TSI Group Co., Ltd.
115Patents
70Active
115Granted
55Portfolio score
Filing activity: Apr 20, 1979 → Apr 27, 2023 · 11 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6158431A | Portable systems and methods for delivery of therapeutic material to the pulmonary system | Human Necessities | 351 | Expired |
| US5247842A | Electrospray apparatus for producing uniform submicrometer droplets | Electricity | 109 | Expired |
| US5098657A | Apparatus for measuring impurity concentrations in a liquid | Performing Operations; Transporting | 95 | Expired |
| US5999250A | System for detecting fluorescing components in aerosols | Physics | 89 | Expired |
| US5343744A | Ultrasonic anemometer | Physics | 73 | Expired |
| US5561515A | Apparatus for measuring particle sizes and velocities | Physics | 64 | Expired |
| US4790650A | Condensation nucleus counter | Physics | 63 | Expired |
| US4387993A | Particle size measuring method and apparatus | Physics | 54 | Expired |
| US5076097A | Method and apparatus for determining concentration of macromolecules and colloids in a liquid sample | Physics | 51 | Expired |
| US5085500A | Non-imaging laser particle counter | Physics | 51 | Expired |
| US4787251A | Directional low differential pressure transducer | Physics | 49 | Expired |
| US7932490B2 | Size segregated aerosol mass concentration measurement device | Physics | 48 | Active |
| US6544484B1 | Aerosol charge adjusting apparatus employing a corona discharge | Physics | 45 | Expired |
| US5121988A | Single particle detector method and apparatus utilizing light extinction within a sheet of light | Physics | 44 | Expired |
| US9726579B2 | System and method of conducting particle monitoring using low cost particle sensors | Physics | 37 | Active |
| US5118959A | Water separation system for condensation particle counter | Physics | 36 | Expired |
| US6568245B2 | Evaporative electrical detector | Emerging Cross-Sectional Technologies | 36 | Expired |
| US6230572A | Instrument for measuring and classifying nanometer aerosols | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4772081A | Fiber optic connector assembly | Physics | 34 | Expired |
| US8708708B1 | Respirator test accessory | Physics | 29 | Active |
| US6125845A | Respirator fit-testing with size selected aerosol | Human Necessities | 29 | Expired |
| US4948257A | Laser optical measuring device and method for stabilizing fringe pattern spacing | Physics | 26 | Expired |
| US7057712B2 | Analysis systems detecting particle size and fluorescence | Physics | 23 | Expired |
| US8047055B2 | Size segregated aerosol mass concentration measurement with inlet conditioners and multiple detectors | Physics | 21 | Active |
| US5351523A | Apparatus and process for determining filter efficiency in removing colloidal suspensions | Physics | 17 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.