F24H 2250/04
Positive temperature coefficients [ptc]
Official title: Positive temperature coefficients [PTC]; Negative temperature coefficients [NTC]
F24H2250/04 (Positive temperature coefficients [ptc]) appears on 63 US grants and 119 published applications in this corpus.
Search patents in F24H- Granted patents
- 63
- Published applications
- 119
- Assignees
- 57
- Inventors
- 262
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2011 | 0 | 2 |
| 2012 | 2 | 8 |
| 2013 | 1 | 8 |
| 2014 | 4 | 7 |
| 2015 | 2 | 13 |
| 2016 | 7 | 7 |
| 2017 | 7 | 5 |
| 2018 | 9 | 8 |
| 2019 | 5 | 6 |
| 2020 | 3 | 15 |
| 2021 | 2 | 12 |
| 2022 | 6 | 5 |
| 2023 | 4 | 5 |
| 2024 | 7 | 12 |
| 2025 | 3 | 3 |
| 2026 | 1 | 3 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Heater and heating pool15 Sep 2026US 12,736,254 B2Oriental Recreational Products (Shanghai) Co., Ltd
- Injection device and electric heating device for corresponding injection device7 Oct 2025US 12,435,687 B2Eberspacher catem GmbH & Co.KG
- Printed heater elements integrated in construction materials29 Jul 2025US 12,371,904 B2E2IP Technologies Inc.
- Heater plate22 Apr 2025US 12,280,217 B2Vincent Medical (Dong Guan) Manufacturing Co., Ltd
- Dynamic equivalent circuit of combined heat and power system, and working method thereof12 Nov 2024US 12,144,254 B2Shandong University
- Fluid heating device16 Jul 2026US 2026/0202091 A1Toshiba Lighting & Technology Corporation
- Electric Heating Device14 May 2026US 2026/0132957 A1Eberspacher catem GmbH & Co.KG
- Blade unit, heater module, and washer fluid supply apparatus including the same2 Apr 2026US 2026/0091762 A1SL Corporation
- Electric heating device for a motor vehicle21 Aug 2025US 2025/0264247 A1Valeo Systemes Thermiques
- Ptc water heater with modular fastening and heating components20 Feb 2025US 2025/0060128 A1Dongguan Sharing Electronics Co., Ltd.
Most cited
By later US patents
- Fan assembly14US 8,366,403 B2Dyson Technology Limited · 2013
- Heat medium heating device and vehicle air conditioner including the same10US 8,948,582 B2Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd. · 2015
- Cooling and retaining body for heating elements, heating appliance and method for producing a cooling and retaining body9US 9,661,688 B2Stego-Holding GmbH · 2017
- Fan assembly8US 8,873,940 B2Dyson Technology Limited · 2014
- Fan assembly7US 8,734,094 B2Dyson Technology Limited · 2014