F21V 29/65
The gas flowing in a closed circuit
Official title: the gas flowing in a closed circuit
F21V29/65 (The gas flowing in a closed circuit) appears on 46 US grants and 47 published applications in this corpus.
Search patents in F21V- Granted patents
- 46
- Published applications
- 47
- Assignees
- 34
- Inventors
- 102
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2012 | 0 | 5 |
| 2013 | 3 | 9 |
| 2014 | 10 | 8 |
| 2015 | 3 | 4 |
| 2016 | 8 | 2 |
| 2017 | 2 | 4 |
| 2018 | 4 | 6 |
| 2019 | 5 | 4 |
| 2020 | 4 | 3 |
| 2021 | 5 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Light fixture6 Jan 2026US 12,516,806 B2Harman Professional Denmark ApS
- Stage light with defogging device30 May 2023US 11,662,088 B1Guangzhou Haoyang Electronic Co., Ltd.
- Finned heat-exchange system28 Sep 2021US 11,131,505 B2Guangzhou Haoyang Electronic Co., Ltd.
- Apparatus for heat exchange by using braided fabric woven from thermally conductive wire material10 Aug 2021US 11,085,626 B2
- Internal-circulating heat dissipation system for stage light13 Jul 2021US 11,060,713 B2Guangzhou Haoyang Electronic Co., Ltd.
- Light Fixture10 Apr 2025US 2025/0116397 A1Harman Professional Denmark ApS
- Internal-Circulating Heat Dissipation System For Stage Light6 May 2021US 2021/0131657 A1Guangzhou Haoyang Electronic Co., Ltd.
- Apparatus for heat exchange by using braided fabric woven from thermally conductive wire material10 Sep 2020US 2020/0284419 A1
- Color wheel apparatus27 Aug 2020US 2020/0271301 A1
- Finned Heat-Exchange System4 Jun 2020US 2020/0173725 A1Guangzhou Haoyang Electronic Co., Ltd.
Most cited
By later US patents
- Optical illuminator129US 8,675,706 B2Princeton Optronics, Inc. · 2014
- Gas cooled LED lamp with heat conductive submount68US 9,322,543 B2Cree, Inc. · 2016
- Concealed vacuum air flow reflector light fixture62US 8,702,283 B2Growlite, Inc. · 2014
- Optical illuminator59US 8,783,893 B12014
- Light source device, apparatus for directing cooling air over the light source device, and projector59US 9,366,947 B2Seiko Epson Corporation · 2016