- All sections
- E - Fixed constructions
- E02D - Foundationsexcavationsembankmentsunderground or underwater structures
- E02D 29/12 - Manhole shaftsOther inspection or access chambersAccessories therefor
Patent holdings for IPC class E02D 29/12
Total number of patents in this class: 293
10-year publication summary
|
48
|
28
|
20
|
39
|
27
|
27
|
19
|
27
|
31
|
15
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Novinium, LLC | 102 |
13 |
| LMK Technologies, LLC | 99 |
12 |
| Nippon Telegraph and Telephone Corporation | 15924 |
10 |
| Geneva Pipe and Precast Company | 9 |
7 |
| Brandenburger Liner GmbH & Co. KG | 29 |
6 |
| Hydro-Klean LLC | 21 |
6 |
| Mueller International, LLC | 744 |
6 |
| Press-seal Corporation | 44 |
6 |
| Sewer Sentry LLC | 15 |
6 |
| AFL Telecommunications LLC | 765 |
5 |
| Infiltrator Water Technologies, LLC | 53 |
5 |
| Hubbell Incorporated | 3442 |
4 |
| Decast Ltd. | 16 |
4 |
| En-Tech Corporation | 13 |
4 |
| Hiram (WA) Pty Ltd | 7 |
4 |
| Novinium, Inc. | 14 |
4 |
| Rooftop Anchor, Inc. | 19 |
4 |
| Resinating LLC | 7 |
4 |
| Innovative Tops, LLC | 4 |
4 |
| Htz Solutions LLC | 6 |
4 |
| Other owners | 175 |