Establishing a communication session using a handshake process with light signals
US-12506540-B2 · Dec 23, 2025 · US
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Apparatus or circuits at the transmitting end
Apparatus or circuits at the transmitting end · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04L15/04 |
| Official title | Apparatus or circuits at the transmitting end |
| Display label | Apparatus or circuits at the transmitting end |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 1 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Establishing a communication session using a handshake process with light signals
US-2024289856-A1 · Aug 29, 2024 · US
Non-transitory computer-readable recording medium, information processing method, and terminal
US-2024179240-A1 · May 30, 2024 · US
High frequency Morse code transmission
US-11018902-B1 · May 25, 2021 · US
Morse code input method and portable electronic device for performing same
US-10764090-B2 · Sep 1, 2020 · US
Morse code input method and portable electronic device for performing same
US-2020106643-A1 · Apr 2, 2020 · US
Transmitter for transmitting a high-rate data transmission through direct excitation
US-10218540-B2 · Feb 26, 2019 · US
Portable electronic device and message processing method therefor
US-9946353-B2 · Apr 17, 2018 · US
Mechanism to transmit text messages using ring time
US-9780968-B2 · Oct 3, 2017 · US
Mechanism to transmit text messages using ring time
US-9774475-B2 · Sep 26, 2017 · US
Mechanism to transmit text messages using ring time
US-2017195138-A1 · Jul 6, 2017 · US
Mechanism to transmit text messages using ring time
US-2017195139-A1 · Jul 6, 2017 · US
Mechanism to transmit text messages using ring time
US-9668116-B1 · May 30, 2017 · US
A transmitter for transmitting a high-rate data transmission through direct excitation
US-2016315790-A1 · Oct 27, 2016 · US
Portable electronic device and message processing method therefor
US-2016054801-A1 · Feb 25, 2016 · US