Koyanagi; Katubumi
Patent Applications and Registrations
Patent applications and USPTO patent grants for Koyanagi; Katubumi.The latest application filed is for "thin-film magnetic head".
- Koyanagi; Katubumi - Nara JP
- Koyanagi; Katubumi - Tenri JP
| Patent | Date |
|---|---|
| Thin-film magnetic head Grant 4,739,431 - Yasuda , et al. April 19, 1 | 1988-04-19 |
| Constant current/constant voltage drive for an electrochromic display cell Grant 4,535,329 - Koyanagi , et al. August 13, 1 | 1985-08-13 |
| Manufacture of display electrode layers in electrochromic display devices Grant 4,430,182 - Hishida , et al. February 7, 1 | 1984-02-07 |
| Combined constant potential and constant voltage driving technique for electrochromic displays Grant 4,295,138 - Nakauchi , et al. October 13, 1 | 1981-10-13 |
| Segmented bargraph display by an electrochromic display device Grant 4,247,855 - Uede , et al. January 27, 1 | 1981-01-27 |
| Additional electrode of electrochromic display and refreshing method for the same Grant 4,229,080 - Take , et al. October 21, 1 | 1980-10-21 |
uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.
While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.
All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.
| 