H03M 11/003
Phantom keys detection and prevention
Official title: {Phantom keys detection and prevention}
H03M11/003 (Phantom keys detection and prevention) appears on 59 US grants and 40 published applications in this corpus.
Search patents in H03M- Granted patents
- 59
- Published applications
- 40
- Assignees
- 55
- Inventors
- 105
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 3 |
| 2003 | 3 | 2 |
| 2004 | 0 | 0 |
| 2005 | 2 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 2 | 3 |
| 2009 | 0 | 3 |
| 2010 | 0 | 5 |
| 2011 | 0 | 3 |
| 2012 | 6 | 1 |
| 2013 | 2 | 1 |
| 2014 | 3 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 3 |
| 2018 | 1 | 2 |
| 2019 | 1 | 3 |
| 2020 | 2 | 0 |
| 2021 | 2 | 2 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Anti-ghosting keyboard16 Dec 2025US 12,500,606 B2Sunrex Technology Corp.
- Detecting actuations of buttons of a control device21 Feb 2023US 11,588,500 B2Lutron Technology Company LLC
- Detecting actuations of buttons of a control device10 May 2022US 11,329,505 B2Lutron Technology Company LLC
- Recognition of simultaneous key presses in keyboards30 Nov 2021US 11,190,207 B2Hewlett-Packard Development Company, L. P.
- Detecting actuations of buttons of a control device30 Mar 2021US 10,965,154 B2Lutron Technology Company LLC
- Keyboard circuit of light emitting anti-ghosting keyboard20 Aug 2026US 2026/0244281 A1Sunrex Technology Corp.
- Anti-ghosting membrane keyboard30 Apr 2026US 2026/0121661 A1Sunrex Technology Corp.
- Anti-ghosting keyboard9 Oct 2025US 2025/0317157 A1Sunrex Technology Corp.
- Ghost key preventing circuit4 Apr 2024US 2024/0113731 A1Primax Electronics Ltd.
- Detecting Actuations of Buttons of a Control Device24 Nov 2022US 2022/0376705 A1Lutron Technology Company LLC
Most cited
By later US patents
- Keyboard with plural key switch matrices to detect ghosting41US 8,159,372 B2Microsoft Corporation · 2012
- Keyboard circuit30US 4,106,011 ATektronix, Inc. · 1978
- Interrupt-generating keyboard scanner using an image RAM27US 5,386,584 AChips and Technologies, Inc. · 1995
- Keyboard scanning and interface method and circuit23US 4,502,038 AConvergent Technologies, Inc. · 1985
- Keyboard scanning20US 4,617,554 AZenith Electronics Corporation · 1986