G02F 1/133638
Waveplates, i.e. plates with a retardation value of lambda/n
Official title: {Waveplates, i.e. plates with a retardation value of lambda/n}
G02F1/133638 (Waveplates, i.e. plates with a retardation value of lambda/n) appears on 1,176 US grants and 1,359 published applications in this corpus.
Search patents in G02F- Granted patents
- 1,176
- Published applications
- 1,359
- Assignees
- 356
- Inventors
- 2,309
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 11 | 0 |
| 1997 | 4 | 0 |
| 1998 | 14 | 0 |
| 1999 | 13 | 0 |
| 2000 | 33 | 0 |
| 2001 | 19 | 12 |
| 2002 | 19 | 31 |
| 2003 | 29 | 29 |
| 2004 | 25 | 45 |
| 2005 | 26 | 41 |
| 2006 | 38 | 64 |
| 2007 | 18 | 51 |
| 2008 | 34 | 46 |
| 2009 | 39 | 51 |
| 2010 | 35 | 40 |
| 2011 | 41 | 37 |
| 2012 | 40 | 51 |
| 2013 | 29 | 42 |
| 2014 | 31 | 50 |
| 2015 | 38 | 65 |
| 2016 | 41 | 60 |
| 2017 | 44 | 69 |
| 2018 | 54 | 70 |
| 2019 | 66 | 75 |
| 2020 | 63 | 81 |
| 2021 | 67 | 83 |
| 2022 | 76 | 67 |
| 2023 | 61 | 65 |
| 2024 | 62 | 60 |
| 2025 | 48 | 44 |
| 2026 | 24 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Liquid crystal display in which at least one pixel includes both a transmissive region and a reflective region320US 6,195,140 B1Sharp Kabushiki Kaisha · 2001
- High efficiency polarized display298US 5,751,388 AHoneywell Inc. · 1998
- Retarder stack for preconditioning light for a modulator having modulation and isotropic states of polarization269US 5,929,946 AColorLink, Inc. · 1999
- Chiral smectic liquid crystal optical modulators having variable retardation259US 5,381,253 ABoard of Regents of the University of Colorado · 1995
- Reflective guest-host liquid-crystal display device242US 6,016,178 ASony Corporation · 2000