Calfee Halter Griswold
Public patent records for Calfee Halter Griswold, 1978–2024: 1,279 patent families shared with other firms for 394 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
- 1,279
- 1978–2024. One family can be counted more than once.
- Activity 2016–2020
- 483
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 394
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 5
Activity trend (2017–2026)
- Scope
- Calfee Halter Griswold · United States
- Filing years
- 2017–2024
- 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 | 156 |
| 2018 | 74 |
| 2019 | 74 |
| 2020 | 58 |
| 2021 · preliminary | 48 |
| 2022 · preliminary | 26 |
| 2023 · preliminary | 2 |
| 2024 · preliminary | 4 |
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 |
|---|---|---|
| Arrangements or circuits for control of indicating devices using static means to present variable informationIPC/CPC G09G | 11.7% | 8.2× |
| Organic electric solid-state devicesIPC/CPC H10K | 10.0% | 5.7× |
| Optical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein; non-linear optics; frequency-changing of light; optical logic elements; optical analogue/digital convertersIPC/CPC G02F | 6.4% | 5.4× |
| Inorganic electric semiconductor devicesIPC/CPC H10D | 6.0% | 4.1× |
| Semiconductor devices not covered by class H10IPC/CPC H01L | 13.4% | 2.2× |
Yearly counts for 2018–2022, added up: 529 of 640 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.
- Troutman Sanders LLP1,278 shared patent families
- Eschweiler & Potashnik, LLC1,275 shared patent families
- Burns & Levinson1,274 shared patent families
- Casimir Jones1,273 shared patent families
- Frost Brown Todd1,269 shared patent families
Compare Calfee Halter Griswold side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for Calfee Halter Griswold. 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.