- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F04B - Positive-displacement machines for liquids; pumps
- F04B 41/02 - Pumping installations or systems specially adapted for elastic fluids having reservoirs
Patent holdings for IPC class F04B 41/02
Total number of patents in this class: 314
10-year publication summary
|
44
|
34
|
38
|
41
|
31
|
39
|
35
|
25
|
29
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Black & Decker, Inc. | 2402 |
20 |
| Max Co., Ltd. | 880 |
14 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1334 |
13 |
| Knorr-Bremse Systeme fur Schienenfahrzeuge GmbH | 566 |
9 |
| Makita Corporation | 2339 |
8 |
| Nabtesco Automotive Corporation | 127 |
8 |
| Koki Holdings Co.,Ltd | 856 |
8 |
| Thermedical, Inc. | 39 |
7 |
| Isuzu Motors Limited | 2158 |
6 |
| Burckhardt Compression AG | 116 |
5 |
| Hydrostor Inc. | 49 |
5 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
5 |
| Graco Minnesota Inc. | 1124 |
4 |
| Hitachi Koki Co., Ltd. | 423 |
4 |
| Milwaukee Electric Tool Corporation | 3572 |
4 |
| Wood Industries, Inc. | 15 |
4 |
| Xi'an Thermal Power Research Institute Co., Ltd. | 244 |
4 |
| Murata Manufacturing Co., Ltd. | 22355 |
3 |
| Eaton-Max, Inc. | 6 |
3 |
| Edwards Limited | 764 |
3 |
| Other owners | 177 |