Ohtaka; Keiji
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ohtaka; Keiji.The latest application filed is for "polarization beam splitter and optical system using the same, and image displaying apparatus, using the same".
Company Profile
0.41.8
- Ohtaka; Keiji - Kanagawa JP
- Ohtaka; Keiji - Kanagawa-ken JP
- Ohtaka; Keiji - Yokohama-shi JP
- Ohtaka; Keiji - Yokohama JP
- Ohtaka; Keiji - Tokyo JP
Patent Activity
| Patent | Date |
|---|---|
| Polarization beam splitter and optical system using the same, and image displaying apparatus, using the same Grant 7,301,700 - Momoki , et al. November 27, 2 | 2007-11-27 |
| Polarization element and optical device using polarization element Grant 7,236,655 - Momoki , et al. June 26, 2 | 2007-06-26 |
| Polarization Beam Splitter And Optical System Using The Same, And Image Displaying Apparatus, Using The Same App 20070058251 - Momoki; Kazuhiko ; et al. | 2007-03-15 |
| Polarization element and optical device using polarization element Grant 7,155,073 - Momoki , et al. December 26, 2 | 2006-12-26 |
| Polarization beam splitter and optical system using the same, and image displaying apparatus, using the same Grant 7,116,478 - Momoki , et al. October 3, 2 | 2006-10-03 |
| Polarization element and optical device using polarization element App 20060204163 - Momoki; Kazuhiko ; et al. | 2006-09-14 |
| Optical device and method for selecting object of focus Grant 7,071,985 - Onoda , et al. July 4, 2 | 2006-07-04 |
| Polarization element and optical device using polarization element App 20050249447 - Momoki, Kazuhiko ; et al. | 2005-11-10 |
| Polarization beam splitter and optical system using the same, and image displaying apparatus, using the same App 20050078372 - Momoki, Kazuhiko ; et al. | 2005-04-14 |
| Projection image display apparatus Grant 6,831,706 - Abe , et al. December 14, 2 | 2004-12-14 |
| Image display apparatus and optical system Grant 6,594,085 - Ohtaka , et al. July 15, 2 | 2003-07-15 |
| Projection image display apparatus App 20030117593 - Abe, Masayuki ; et al. | 2003-06-26 |
| Anti-fog coating material and anti-fog article App 20020061950 - Yamamoto, Tohru ; et al. | 2002-05-23 |
| Image display apparatus and optical system App 20020021498 - Ohtaka, Keiji ; et al. | 2002-02-21 |
| Focus State Detection Apparatus With Image Sensing Device Controls App 20020003582 - KADOHARA, TERUTAKE ; et al. | 2002-01-10 |
| Anti-fogging coating material, anti-fogging coating film and anti-fogging article Grant 6,306,932 - Yamamoto , et al. October 23, 2 | 2001-10-23 |
| Focus detecting device Grant 6,088,537 - Ohtaka , et al. July 11, 2 | 2000-07-11 |
| Semiconductor photo-sensor and method for manufacturing the same Grant 5,912,504 - Yoshizawa , et al. June 15, 1 | 1999-06-15 |
| Focus detecting apparatus Grant 5,839,001 - Ohtaka , et al. November 17, 1 | 1998-11-17 |
| Focus detection device for objective lens Grant 5,797,049 - Ohtaka , et al. August 18, 1 | 1998-08-18 |
| Focus detecting apparatus Grant 5,771,413 - Suda , et al. June 23, 1 | 1998-06-23 |
| Method for manufacturing a semiconductor photo-sensor Grant 5,583,076 - Yoshizawa , et al. December 10, 1 | 1996-12-10 |
| Camera with visual axis detecting device Grant 5,486,892 - Suzuki , et al. January 23, 1 | 1996-01-23 |
| Compact focus detecting device suitable for incorporation into an optical apparatus Grant 5,262,819 - Ohtaka , et al. November 16, 1 | 1993-11-16 |
| Image pickup apparatus for controlling accumulation time in photoelectric elements Grant 5,182,658 - Ishizaki , et al. January 26, 1 | 1993-01-26 |
| Information display apparatus for camera Grant 5,053,803 - Suda , et al. October 1, 1 | 1991-10-01 |
| Focus detecting apparatus having a plurality of focus detecting areas Grant 5,005,041 - Suda , et al. April 2, 1 | 1991-04-02 |
| Focus detecting device having a plurality of detecting areas and camera provided with the same Grant 4,992,819 - Ohtaka , et al. February 12, 1 | 1991-02-12 |
| Focus detecting device Grant 4,975,727 - Ohtaka , et al. December 4, 1 | 1990-12-04 |
| Multi-directional focus state detection apparatus Grant 4,859,842 - Suda , et al. August 22, 1 | 1989-08-22 |
| Focus detecting device Grant 4,849,782 - Koyama , et al. July 18, 1 | 1989-07-18 |
| Apparatus for detecting the focus adjusted state of an objective optical system Grant 4,841,326 - Koyama , et al. June 20, 1 | 1989-06-20 |
| Distance detection method and apparatus Grant 4,825,239 - Suda , et al. April 25, 1 | 1989-04-25 |
| Focus detecting apparatus Grant 4,812,869 - Akashi , et al. March 14, 1 | 1989-03-14 |
| Focus detecting system Grant 4,801,963 - Koyama , et al. January 31, 1 | 1989-01-31 |
| Focus detecting device having two selectively movable lenses Grant 4,792,669 - Ohnuki , et al. December 20, 1 | 1988-12-20 |
| Camera having a focus detecting apparatus Grant 4,774,539 - Suda , et al. September 27, 1 | 1988-09-27 |
| Focus detecting device using adjustable inclined sensing means Grant 4,728,785 - Ohnuki , et al. March 1, 1 | 1988-03-01 |
| Focus state detection method and apparatus with selective statistical processing Grant 4,716,282 - Akashi , et al. December 29, 1 | 1987-12-29 |
| Sharp focus detecting device Grant 4,712,901 - Ohtaka December 15, 1 | 1987-12-15 |
| Focus detecting device Grant 4,699,493 - Koyama , et al. October 13, 1 | 1987-10-13 |
| Focus detector system with a distortion compensation mask Grant 4,698,492 - Ohtaka , et al. October 6, 1 | 1987-10-06 |
| Focus detecting device with shading reduction optical filter Grant 4,670,645 - Ohtaka , et al. June 2, 1 | 1987-06-02 |
| Exposure control apparatus Grant 4,643,557 - Ishizaki , et al. February 17, 1 | 1987-02-17 |
| Diffusing plate Grant 4,567,123 - Ohtaka , et al. January 28, 1 | 1986-01-28 |
| Camera with active optical range finder Grant 4,534,637 - Suzuki , et al. August 13, 1 | 1985-08-13 |
| Focusing screen Grant 4,443,088 - Ohtaka April 17, 1 | 1984-04-17 |
| Diffusion plate Grant 4,427,265 - Suzuki , et al. January 24, 1 | 1984-01-24 |
| Focussing plate Grant 4,421,398 - Suzuki , et al. December 20, 1 | 1983-12-20 |
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.
| 