KOWA COMPANY, LTD.
592Patents
270Active
592Granted
53Portfolio score
Filing activity: Feb 22, 1973 → Apr 7, 2023 · 125 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7883540B2 | Intraocular lens | Human Necessities | 713 | Active |
| US5575285A | Apparatus for measuring oxygen saturation | Human Necessities | 214 | Expired |
| US5291885A | Apparatus for measuring blood flow | Human Necessities | 166 | Expired |
| US5522388A | Pulse spectrometer | Human Necessities | 148 | Expired |
| US7022713B2 | Hyperlipemia therapeutic agent | Human Necessities | 113 | Expired |
| US7776881B2 | Hyperlipemia therapeutic agent | Human Necessities | 103 | Active |
| US6198540A | Optical coherence tomography have plural reference beams of differing modulations | Physics | 82 | Expired |
| US5425729A | Laser coagulation system | Human Necessities | 68 | Expired |
| US4938584A | Ophthalmic diagnostic method and apparatus | Human Necessities | 64 | Expired |
| US5621523A | Method and apparatus for measuring particles in a fluid | Physics | 62 | Expired |
| US5257087A | Method and apparatus for measuring particles in a fluid | Physics | 62 | Expired |
| US6983058B1 | Method of embedding digital watermark, storage medium in which the method is stored, method of identifying embedded digital watermark, and apparatus for embedding digital watermark | Physics | 57 | Expired |
| US5129400A | Ophthalmological measurement method and apparatus | Human Necessities | 54 | Expired |
| US5430509A | Scanning laser ophthalmoscope | Human Necessities | 52 | Expired |
| US5598841A | Blood flow measurement system | Human Necessities | 52 | Expired |
| US5647032A | Interferometers for measuring coherence length and high-speed switching of laser light | Physics | 51 | Expired |
| US6973195B1 | Method for embedding electronic watermark and method for decoding the same | Electricity | 51 | Expired |
| US5353073A | Three-dimensional shape measurement system | Human Necessities | 45 | Expired |
| US4830494A | Method and apparatus for measuring particles in a fluid | Physics | 44 | Expired |
| US5719659A | Ophthalmic apparatus having light polarizing means | Human Necessities | 41 | Expired |
| US4806950A | Image recording apparatus for heat generation type | Electricity | 40 | Expired |
| US5691839A | Laser scanning optical microscope | Electricity | 39 | Expired |
| US5936764A | Laser scanning optical microscope | Electricity | 39 | Expired |
| US4758782A | Method and apparatus for inspecting printed circuit board | Physics | 38 | Expired |
| US4505893A | Purified plasminogen activator, process for its production and thrombolytic composition containing it | Human Necessities | 37 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.