G21K 1/046
Varying the contour of the field
Official title: {varying the contour of the field, e.g. multileaf collimators}
G21K1/046 (Varying the contour of the field) appears on 337 US grants and 330 published applications in this corpus.
Search patents in G21K- Granted patents
- 337
- Published applications
- 330
- Assignees
- 166
- Inventors
- 624
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 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 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 2 |
| 2002 | 3 | 3 |
| 2003 | 4 | 6 |
| 2004 | 10 | 8 |
| 2005 | 4 | 6 |
| 2006 | 5 | 5 |
| 2007 | 3 | 8 |
| 2008 | 4 | 14 |
| 2009 | 15 | 13 |
| 2010 | 10 | 15 |
| 2011 | 10 | 14 |
| 2012 | 9 | 12 |
| 2013 | 11 | 18 |
| 2014 | 12 | 18 |
| 2015 | 20 | 20 |
| 2016 | 18 | 17 |
| 2017 | 9 | 21 |
| 2018 | 20 | 19 |
| 2019 | 18 | 13 |
| 2020 | 21 | 23 |
| 2021 | 13 | 15 |
| 2022 | 13 | 22 |
| 2023 | 14 | 20 |
| 2024 | 20 | 10 |
| 2025 | 15 | 4 |
| 2026 | 7 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for driving leaves in a multi-leaf collimator6 Oct 2026US 12,755,858 B2Shanghai United Imaging Healthcare Co., Ltd.
- Collimator apparatus and motion control method26 May 2026US 12,636,520 B2Jiangsu Rayer Medical Technology Co., Ltd
- Irradiation apparatus and irradiation method using same24 Mar 2026US 12,588,131 B2National Cancer Center
- Radiotherapy system17 Mar 2026US 12,576,288 B2Our United Corporation
- Leaf actuator for a multi-leaf collimator24 Feb 2026US 12,558,568 B2Elekta Limited
- Dose distribution calculation system, program, and dose distribution calculation method16 Jul 2026US 2026/0204450 A1Hitachi High-Tech Corporation
- Adjustable radiotherapy collimator devices and systems2 Jul 2026US 2026/0183569 A1Board of Regents, The University of Texas System
- Direct-acting vertical lamellae drive14 May 2026US 2026/0135011 A1Varian Medical Systems, Inc.
- Multi-leaf collimators, radiation treatment devices, and control methods thereof30 Apr 2026US 2026/0115493 A1Shanghai United Imaging Healthcare Co., Ltd.
- Collimator arrangement for an x-ray tube13 Nov 2025US 2025/0349446 A1Siemens Healthineers AG
Most cited
By later US patents
- Mutileaf collimator for radiotherapy machines304US 4,868,844 AVarian Associates, Inc. · 1989
- Method and apparatus for proton therapy269US 5,668,371 AWisconsin Alumni Research Foundation · 1997
- Radiation therapy system with constrained rotational freedom245US 5,724,400 AWisconsin Alumni Research Foundation · 1998
- Ion beam scanner system and operating method210US 6,891,177 B1Gesellschaft fuer Schwerionenforschung mbH · 2005
- Blade collimator for radiation therapy202US 5,889,834 ABrainLAB Med. Computersysteme GmbH · 1999