Device for observing a sample by imaging
US-12510471-B2 · Dec 30, 2025 · US
Schlieren-optical systems
Schlieren-optical systems · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G02B27/54 |
| Official title | Schlieren-optical systems |
| Display label | Schlieren-optical systems |
| Total patents | 26 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 1 |
| 2022 | 5 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Visualizing catheter irrigation using schlieren images
US-12449672-B2 · Oct 21, 2025 · US
Driver monitoring apparatus, vehicle and control method
US-12211294-B2 · Jan 28, 2025 · US
Methods and apparatus for a self-aligned digital projection and reflected glare reduction imaging system
US-12072286-B2 · Aug 27, 2024 · US
Device for observing a sample by imaging
US-2024219300-A1 · Jul 4, 2024 · US
Visualizing catheter irrigation using schlieren images
US-2024142791-A1 · May 2, 2024 · US
Visualizing catheter irrigation using schlieren images
US-11867924-B2 · Jan 9, 2024 · US
Smile correction using FAC lens deformation
US-11594863-B2 · Feb 28, 2023 · US
Display device and system
US-11531200-B2 · Dec 20, 2022 · US
Methods and apparatus for a self-aligned digital projection and reflected glare reduction imaging system
US-2022299437-A1 · Sep 22, 2022 · US
Measurement method and measurement apparatus
US-11386570-B2 · Jul 12, 2022 · US
Visualizing Catheter Irrigation Using Schlieren Images
US-2022202480-A1 · Jun 30, 2022 · US
Driver monitoring apparatus, vehicle and control method
US-2022188555-A1 · Jun 16, 2022 · US
Display Device and System
US-2021373332-A1 · Dec 2, 2021 · US
Smile correction using fac lens deformation
US-2020285049-A1 · Sep 10, 2020 · US
Measurement method and measurement apparatus
US-2020286249-A1 · Sep 10, 2020 · US
Devices for refractive field visualization
US-10636149-B2 · Apr 28, 2020 · US
Smile correction using FAC lens deformation
US-10627618-B2 · Apr 21, 2020 · US
Fourier lens, method for designing Fourier lens, and schlieren apparatus
US-10459127-B2 · Oct 29, 2019 · US
Fourier lens, method for designing fourier lens, and schlieren apparatus
US-2019041552-A1 · Feb 7, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G02B27/54?
- CPC G02B27/54 is the Cooperative Patent Classification code for “Schlieren-optical systems.”
- How many patents are filed under CPC G02B27/54 (Schlieren-optical systems)?
- Our database includes 26 publications tagged with this CPC code.
- Is patent activity under CPC G02B27/54 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).