Emergency report system for elevator
US-12479695-B2 · Nov 25, 2025 · US
Arrangements for interconnection not involving centralised switching
Arrangements for interconnection not involving centralised switching · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04M9/00 |
| Official title | Arrangements for interconnection not involving centralised switching |
| Display label | Arrangements for interconnection not involving centralised switching |
| Total patents | 55 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 9 |
| 2019 | 9 |
| 2020 | 6 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 4 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
In-home event intercom and notifications
US-2025356750-A1 · Nov 20, 2025 · US
In-home event intercom and notifications
US-12406562-B2 · Sep 2, 2025 · US
Visitor management apparatus, visitor management method and non-transitory recording medium
US-2025259493-A1 · Aug 14, 2025 · US
Audio capture
US-2025247645-A1 · Jul 31, 2025 · US
Evaluation method, evaluation apparatus, and program
US-12087321-B2 · Sep 10, 2024 · US
Electronic device and microphone signal correction method thereof
US-2024265931-A1 · Aug 8, 2024 · US
Control method for notification system, and notification system
US-12051269-B2 · Jul 30, 2024 · US
Information processing apparatus, information processing method, and non-transitory computer-readable storage medium
US-2024029493-A1 · Jan 25, 2024 · US
Control method and control device for notification system
US-11830342-B2 · Nov 28, 2023 · US
In-home event intercom and notifications
US-2023360507-A1 · Nov 9, 2023 · US
Evaluation method, evaluation apparatus, and program
US-2023076338-A1 · Mar 9, 2023 · US
Message recording system for broadcast intercoms
US-11582335-B2 · Feb 14, 2023 · US
Method and device for updating coefficient vector of finite impulse response filter
US-11450335-B2 · Sep 20, 2022 · US
Control method and control device for notification system
US-2022198908-A1 · Jun 23, 2022 · US
Electronic device configured to communicate with an intercom, and control method thereof
US-11269417-B2 · Mar 8, 2022 · US
Message delivery device, Method, and recording medium
US-11252539-B2 · Feb 15, 2022 · US
Control method for notification system, and notification system
US-2021374389-A1 · Dec 2, 2021 · US
Emergency report system for elevator
US-2021253395-A1 · Aug 19, 2021 · US
Electronic lock control apparatus, electronic lock control system, electronic lock control method, and program
US-2021183193-A1 · Jun 17, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04M9/00?
- CPC H04M9/00 is the Cooperative Patent Classification code for “Arrangements for interconnection not involving centralised switching.”
- How many patents are filed under CPC H04M9/00 (Arrangements for interconnection not involving centralised switching)?
- Our database includes 55 publications tagged with this CPC code.
- Is patent activity under CPC H04M9/00 growing?
- Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).