G04B 21/04
Hour wheels
Official title: Hour wheels; Racks or rakes; Snails or similar control mechanisms
G04B21/04 (Hour wheels) appears on 24 US grants and 23 published applications in this corpus.
Search patents in G04B- Granted patents
- 24
- Published applications
- 23
- Assignees
- 14
- Inventors
- 39
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 3 |
| 2012 | 1 | 3 |
| 2013 | 3 | 0 |
| 2014 | 2 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 3 |
| 2017 | 2 | 1 |
| 2018 | 1 | 1 |
| 2019 | 2 | 6 |
| 2020 | 1 | 0 |
| 2021 | 3 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Horological module actuatable at isolated moments, comprising automatic locking means4 Aug 2026US 12,699,357 B2Montres Jaquet Droz SA
- Method for manufacturing a silicon balance spring18 Nov 2025US 12,474,674 B2Nivarox-FAR S. A.
- Repeater with disengageable transmission mobile15 Mar 2022US 11,275,342 B2Montres Breguet S. A.
- Chronograph repeater mechanism with safety function11 Jan 2022US 11,221,589 B2Omega SA
- Acoustic timepiece display mechanism, particularly a chronograph repeater7 Dec 2021US 11,194,291 B2Omega SA
- Mechanism for a striking timepiece8 Jan 2026US 2026/0010120 A1Bulgari Horlogerie SA
- Horological module actuatable at isolated moments, comprising automatic locking means11 Apr 2024US 2024/0118663 A1Montres Jaquet Droz SA
- Method for manufacturing a silicon balance spring1 Feb 2024US 2024/0036524 A1Nivarox-FAR S. A.
- Repeater with disengageable transmission mobile4 Jul 2019US 2019/0204785 A1Montres Breguet S. A.
- Repeater mechanism with tensioned chain27 Jun 2019US 2019/0196409 A1Montres Breguet S. A.
Most cited
By later US patents
- Music box having time-sounding function8US 4,349,899 AKabushiki Kaisha Sankyo Seiki Seisakusho · 1982
- Timepiece provided with open dial plate7US 7,420,885 B2Christophe Claret S.A. · 2008
- Electronic timepiece with a time striking device5US 4,358,838 ARhythm Watch Co., Ltd. · 1982
- Alarm strike using the grand strike4US 8,599,651 B2Montres Breguet S. A. · 2013
- Safety mechanism for selection and/or actuation of a timepiece striking work2US 10,095,185 B2Blancpain SA · 2018