G11B 7/1367
Stepped phase plates
G11B7/1367 (Stepped phase plates) appears on 276 US grants and 253 published applications in this corpus.
Search patents in G11B- Granted patents
- 276
- Published applications
- 253
- Assignees
- 85
- Inventors
- 383
- Latest grant
- 12 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 6 | 0 |
| 1997 | 10 | 0 |
| 1998 | 9 | 0 |
| 1999 | 13 | 0 |
| 2000 | 15 | 0 |
| 2001 | 17 | 10 |
| 2002 | 7 | 12 |
| 2003 | 6 | 20 |
| 2004 | 11 | 19 |
| 2005 | 9 | 42 |
| 2006 | 18 | 41 |
| 2007 | 22 | 13 |
| 2008 | 22 | 20 |
| 2009 | 16 | 25 |
| 2010 | 26 | 16 |
| 2011 | 21 | 7 |
| 2012 | 12 | 14 |
| 2013 | 13 | 7 |
| 2014 | 9 | 5 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Optical memory, optical diffraction element, and recording method12 Nov 2024US 12,142,307 B2Fujikura Ltd.
- Optical pickup device and optical drive device14 Aug 2018US 10,049,695 B2Panasonic Intellectual Property Management Co., Ltd.
- Optical element and optical head apparatus including the same7 Apr 2015US 9,001,635 B2Panasonic Intellectual Property Management Co., Ltd.
- Objective lens for optical pickup device, and optical pickup device28 Oct 2014US 8,873,166 B2Konica Minolta Advanced Layers, Inc.
- Optical information device, optical disc driving device, optical information recording device, optical information reproducing device, gap control method, and optical pickup16 Sep 2014US 8,837,264 B2Panasonic Corporation
- Optical memory, optical diffraction element, and recording method1 Feb 2024US 2024/0038264 A1Fujikura Ltd.
- Optical pickup device and optical drive device19 Oct 2017US 2017/0301369 A1Panasonic Intellectual Property Management Co., Ltd.
- Optical element and optical head apparatus including the same2 Oct 2014US 2014/0293766 A1Panasonic Corporation
- Objective lens element4 Sep 2014US 2014/0247493 A1Panasonic Corporation
- Objective lens element and optical head device including the same29 May 2014US 2014/0146653 A1Panasonic Corporation
Most cited
By later US patents
- Optical head apparatus for different types of disks78US 5,696,750 ANEC Corporation · 1997
- Lens device comprising light blocking means and an optical pickup apparatus using the lens device70US 5,665,957 ASamsung Electronics Co., Ltd. · 1997
- Method of and apparatus for optically writing, reading and erasing a multi-plane record carrier, and record carrier suitable for said method and apparatus61US 5,408,453 AU. S. Philips Corporation · 1995
- Apparatus and methods employing phase control and analysis of evanescent illumination for imaging and metrology of subwavelength lateral surface topography53US 5,666,197 APolaroid Corporation · 1997
- Optical apparatus for optically rotating a portion of a polarization axis of a linearly polarized light48US 6,191,829 B1Citizen Watch Co., Ltd. · 2001