Optical Transmission System, Optical Transmission Method, Transmitter, and Receiver
US-2024380491-A1 · Nov 14, 2024 · US
using direct modulation
using direct modulation · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04B10/504 |
| Official title | {using direct modulation} |
| Display label | using direct modulation |
| Total patents | 425 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 19 |
| 2016 | 34 |
| 2017 | 26 |
| 2018 | 40 |
| 2019 | 44 |
| 2020 | 57 |
| 2021 | 46 |
| 2022 | 45 |
| 2023 | 44 |
| 2024 | 29 |
| 2025 | 37 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Optical transmission circuit, optical transmission device, and optical transmission system
US-9813162-B2 · Nov 7, 2017 · US
Optical module for preventing laser beam leakage and control method thereof
US-2017310082-A1 · Oct 26, 2017 · US
Fiber communication systems and methods
US-2017294966-A1 · Oct 12, 2017 · US
Current outputting circuit and optical transmitter
US-9749059-B2 · Aug 29, 2017 · US
Drive circuit of light emitting element
US-2017222397-A1 · Aug 3, 2017 · US
Amplification circuit
US-9559655-B2 · Jan 31, 2017 · US
Optical communication module
US-9531476-B2 · Dec 27, 2016 · US
Optical communication module, optical network unit, and method of controlling light-emitting element
US-9525480-B2 · Dec 20, 2016 · US
Multiple endpoint optical transmitter
US-2016359297-A1 · Dec 8, 2016 · US
Method and device for conveying optical data
US-9509407-B2 · Nov 29, 2016 · US
Current-mode driver with built-in continuous-time linear equalization
US-9496963-B2 · Nov 15, 2016 · US
Drive circuit and optical network unit
US-2016329968-A1 · Nov 10, 2016 · US
Hybrid laser anti-clipping for fiber-coaxial networks
US-9485021-B2 · Nov 1, 2016 · US
Method and circuit to reduce power consumption of optical transmitter
US-2016315713-A1 · Oct 27, 2016 · US
Optical communication device and optical communication method
US-9479253-B2 · Oct 25, 2016 · US
Optical signal conversion device and method thereof
US-9473247-B2 · Oct 18, 2016 · US
Current-Mode Driver
US-2016248517-A1 · Aug 25, 2016 · US
Current-Mode Driver with Built-In Continuous-Time Linear Equalization
US-2016248518-A1 · Aug 25, 2016 · US
Amplification circuit
US-2016204753-A1 · Jul 14, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04B10/504?
- CPC H04B10/504 is the Cooperative Patent Classification code for “using direct modulation.”
- How many patents are filed under CPC H04B10/504 (using direct modulation)?
- Our database includes 425 publications tagged with this CPC code.
- Is patent activity under CPC H04B10/504 growing?
- Publication counts under this code: 29 in 2024 vs 37 in 2025 (latest complete years).