Birch, Stewart, Kolasch & Birch, LLP
Public patent records for Birch, Stewart, Kolasch & Birch, LLP, 1978–2025: 32,304 patent families shared with other firms for 5,983 clients (applicants). Sign in to explore the app’s partner network, selected filing periods, filing activity, and client relationships.
- Patent families shared with other firms
- 32,304
- 1978–2025. One family can be counted more than once.
- Activity 2016–2020
- 6,900
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 5,983
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 5
Activity trend (2017–2026)
- Scope
- Birch, Stewart, Kolasch & Birch, LLP · United States
- Filing years
- 2017–2025
- Unit
- Distinct families per year
2021–2026 are preliminary. Patent filings publish about 18 months after filing, and foreign filings can enter later, so these counts are still filling in.
Each family counts once within a year. A family may recur in multiple years.
View annual counts
| Year | Distinct families per year |
|---|---|
| 2017 | 1,277 |
| 2018 | 1,169 |
| 2019 | 1,605 |
| 2020 | 1,185 |
| 2021 · preliminary | 559 |
| 2022 · preliminary | 446 |
| 2023 · preliminary | 125 |
| 2024 · preliminary | 34 |
| 2025 · preliminary | 3 |
Technology fields it focuses on
Fields where this firm's share of patent families is well above the average for United States firms, 2018–2022.
| Field | Share of its families | vs United States average |
|---|---|---|
| Air-conditioning; air-humidification; ventilation; use of air currents for screeningIPC/CPC F24F | 3.1% | 5.9× |
| Magnets; inductances; transformers; selection of materials for their magnetic propertiesIPC/CPC H01F | 3.5% | 4.5× |
| Refrigeration machines, plants or systems; combined heating and refrigeration systems; heat pump systemsIPC/CPC F25B | 2.4% | 4.3× |
| Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in generalIPC/CPC C23C | 5.1% | 3.8× |
| Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energyIPC/CPC H01M | 12.7% | 3.8× |
Yearly counts for 2018–2022, added up: 5,253 of 9,425 families carry an IPC or CPC classification. Shares are of those classified families, and one family can fall in several fields.
Frequently associated firms
Firms that most often appear on the same patent families. One family can be counted more than once, so these are not unique totals.
Similar United States firms
Yearly counts since 1990, added up. One family can be counted more than once.
- Oliff PLC33,881 shared patent families
- Sughrue Mion42,068 shared patent families
- Fish & Richardson21,700 shared patent families
- Harness Dickey20,981 shared patent families
- Cantor Colburn LLP20,383 shared patent families
Compare Birch, Stewart, Kolasch & Birch, LLP side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for Birch, Stewart, Kolasch & Birch, LLP. App counts follow the filing years and corridors you choose, so they can differ from this public profile.
Filing activity
Recorded patent families across the filing years you choose.
Full partner list
Every observed counterpart for the filing period you choose.
Named clients
Applicant relationships behind the exchange counts.