Wireless charging transmitter device
US-2025149928-A1 · May 8, 2025 · US
having stepped portions, e.g. staircase waveform
having stepped portions, e.g. staircase waveform · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H03K4/02 |
| Official title | having stepped portions, e.g. staircase waveform |
| Display label | having stepped portions, e.g. staircase waveform |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 1 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 6 |
| 2020 | 3 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Edge rate (rise and fall time) controlled segmented laser driver
US-2023411927-A1 · Dec 21, 2023 · US
Ramp settling assist circuit in local ramp buffer circuit
US-11722801-B1 · Aug 8, 2023 · US
Sinusoidal wave formation for reduction of oscillations, harmonics and distortion using short pulses to reduce the number of required impedance injection units
US-11394375-B2 · Jul 19, 2022 · US
Sinusoidal Wave Formation for Reduction of Oscillations, Harmonics and Distortion Using Short Pulses to Reduce the Number of Required Impedance Injection Units
US-2022116028-A1 · Apr 14, 2022 · US
Method and system for generating a ramping signal
US-11272134-B2 · Mar 8, 2022 · US
Method and system for generating a ramping signal
US-10992893-B2 · Apr 27, 2021 · US
Gate select signal with reduced interference
US-10977980-B2 · Apr 13, 2021 · US
Square wave generating method and square wave generating circuit
US-10979040-B2 · Apr 13, 2021 · US
Method and system for generating a ramping signal
US-2021105429-A1 · Apr 8, 2021 · US
Ramp signal generation device and CMOS image sensor including the same
US-10904470-B2 · Jan 26, 2021 · US
Gate select signal with reduced interference
US-2021012695-A1 · Jan 14, 2021 · US
Gate select signal with reduced interference
US-10825373-B1 · Nov 3, 2020 · US
Square Wave Generating Method and Square Wave Generating Circuit
US-2020212905-A1 · Jul 2, 2020 · US
Square wave generating method and square wave generating circuit
US-10622985-B2 · Apr 14, 2020 · US
Method and system for generating a ramping signal
US-2019356876-A1 · Nov 21, 2019 · US
Method and system for generating a ramping signal
US-10440303-B2 · Oct 8, 2019 · US
Ramp signal generation device and cmos image sensor including the same
US-2019289236-A1 · Sep 19, 2019 · US
Square Wave Generating Method and Square Wave Generating Circuit
US-2019044507-A1 · Feb 7, 2019 · US
Spread spectrum clock generator circuit
US-10200045-B2 · Feb 5, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H03K4/02?
- CPC H03K4/02 is the Cooperative Patent Classification code for “having stepped portions, e.g. staircase waveform.”
- How many patents are filed under CPC H03K4/02 (having stepped portions, e.g. staircase waveform)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC H03K4/02 growing?
- Publication counts under this code: 2 in 2023 vs 1 in 2025 (latest complete years).