- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F01L - Cyclically operating valves for machines or engines
- F01L 1/352 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
Patent holdings for IPC class F01L 1/352
Total number of patents in this class: 386
10-year publication summary
26
|
37
|
40
|
51
|
41
|
44
|
16
|
29
|
6
|
4
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Schaeffler Technologies AG & Co. KG | 8880 |
88 |
Denso Corporation | 23338 |
46 |
BorgWarner Inc. | 2604 |
32 |
Schaeffler KG | 960 |
27 |
Hitachi Automotive Systems, Ltd. | 3970 |
24 |
Aisin Seiki Kabushiki Kaisha | 2427 |
17 |
DaimlerChrysler AG | 574 |
12 |
Hitachi Astemo, Ltd. | 5618 |
12 |
Daimler AG | 3462 |
9 |
Magna Powertrain AG & Co KG | 155 |
9 |
NTN Corporation | 5008 |
7 |
Aisin Corporation | 1164 |
7 |
Pierburg GmbH | 435 |
6 |
TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13301 |
6 |
Mitsubishi Electric Corporation | 43934 |
5 |
ZF Friedrichshafen AG | 6820 |
5 |
Nippon Soken, Inc. | 363 |
5 |
Toyota Jidosha Kabushiki Kaisha | 983 |
4 |
Robert Bosch GmbH | 40953 |
3 |
GM Global Technology Operations LLC | 13620 |
3 |
Other owners | 59 |