Tung An Development Ltd.
Hsinchu County, TW· latest recorded location
Tung An Development Ltd. is named on 3 US grants and 5 published applications in this corpus. Its most frequent classification is B08B (Cleaning in general).
- Granted patents
- 3
- Published applications
- 5
- Inventors
- 10
- Granted in 2026 so far
- 0
- Most recent grant
- 7 Sep 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
By publication year.
Technology areas
Share of 8 documents
Recent patents
- Device of bi-spiral cleaning brush7 Sep 2021US 11,109,667 B2
- Device of cleaning brush1 Sep 2020US 10,758,946 B2
- Cleaning cylinder apparatus10 Feb 2015US 8,950,032 B2
- Device Having Cleaning Bodies8 Jun 2023US 2023/0178360 A1
- Device of Bi-Spiral Cleaning Brush22 Apr 2021US 2021/0112961 A1
- Device of Cleaning Brush23 Jul 2020US 2020/0230656 A1
- Cleaning Cylinder Apparatus26 Apr 2012US 2012/0096660 A1
- Cleaning Apparatus for Sophisticated Electric Device26 Aug 2010US 2010/0212100 A1
Most cited
By later US patents