H01H 2219/056
Diffuser
Official title: Diffuser; Uneven surface
H01H2219/056 (Diffuser) appears on 315 US grants and 373 published applications in this corpus.
Search patents in H01H- Granted patents
- 315
- Published applications
- 373
- Assignees
- 168
- Inventors
- 584
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 3 |
| 2002 | 1 | 5 |
| 2003 | 5 | 5 |
| 2004 | 1 | 3 |
| 2005 | 5 | 4 |
| 2006 | 1 | 12 |
| 2007 | 7 | 21 |
| 2008 | 12 | 22 |
| 2009 | 11 | 25 |
| 2010 | 14 | 25 |
| 2011 | 12 | 25 |
| 2012 | 22 | 17 |
| 2013 | 13 | 7 |
| 2014 | 19 | 16 |
| 2015 | 6 | 12 |
| 2016 | 7 | 8 |
| 2017 | 9 | 13 |
| 2018 | 11 | 9 |
| 2019 | 15 | 33 |
| 2020 | 22 | 17 |
| 2021 | 11 | 6 |
| 2022 | 13 | 18 |
| 2023 | 19 | 25 |
| 2024 | 23 | 17 |
| 2025 | 10 | 8 |
| 2026 | 15 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Backlight module and lighting keyboard22 Sep 2026US 12,744,169 B2Darfon Electronics Corp.
- Keyboard device and electronic apparatus18 Aug 2026US 12,712,139 B2Lenovo (Singapore) Pte. Ltd.
- Backlight module for lighting keyboard23 Jun 2026US 12,665,143 B2Darfon Electronics Corp.
- Lighting keyboard and backlight module thereof23 Jun 2026US 12,665,146 B2Darfon Electronics Corp.
- Lighting keyboard, backlight module and lighting board9 Jun 2026US 12,650,551 B2Darfon Electronics Corp.
- Device having integrated interface system17 Sep 2026US 2026/0277330 A1Apple Inc.
- Conveyance interior part16 Jul 2026US 2026/0200398 A1Alps Alpine Co., Ltd.
- Light-emitting keyboard9 Jul 2026US 2026/0196418 A1Lite-On Electronics (Guangzhou) Limited
- Keyboard device and electronic apparatus11 Jun 2026US 2026/0162917 A1Lenovo (Singapore) Pte. Ltd.
- Key structure4 Jun 2026US 2026/0155322 A1Lite-On Technology Corporation
Most cited
By later US patents
- Integrated display panel assemblies176US 5,975,711 ALumitex, Inc. · 1999
- Light emitting panel assemblies for use in automotive applications and the like156US 5,895,115 ALumitex, Inc. · 1999
- Illuminator optical fiber rod141US 4,765,701 APoly-Optical Products, Inc. · 1988
- Light emitting panel assemblies for use in automotive applications and the like120US 6,158,867 ALumitex, Inc. · 2000
- Light distribution for illuminated keyboard switches and displays119US 5,397,867 ALucas Industries Limited · 1995