Optical device
US-2025370366-A1 · Dec 4, 2025 · US
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in which the projection optics remain stationary
in which the projection optics remain stationary · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G03B27/528 |
| Official title | {in which the projection optics remain stationary} |
| Display label | in which the projection optics remain stationary |
| Total patents | 19 |
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 | 2 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 2 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Optical device
US-12405548-B2 · Sep 2, 2025 · US
Image forming apparatus
US-2025147448-A1 · May 8, 2025 · US
Image forming apparatus
US-12228865-B2 · Feb 18, 2025 · US
Optical device
US-2024264549-A1 · Aug 8, 2024 · US
Image forming apparatus
US-2023069503-A1 · Mar 2, 2023 · US
Image forming apparatus
US-11543759-B2 · Jan 3, 2023 · US
Lens unit, exposure device, reading head, image forming apparatus, and image reading apparatus
US-11199650-B2 · Dec 14, 2021 · US
Image forming apparatus
US-2021003937-A1 · Jan 7, 2021 · US
Image forming apparatus
US-10824088-B2 · Nov 3, 2020 · US
Lens unit, exposure device, reading head, image forming apparatus, and image reading apparatus
US-2020292732-A1 · Sep 17, 2020 · US
Image forming apparatus
US-2019204762-A1 · Jul 4, 2019 · US
Image forming apparatus
US-10274859-B2 · Apr 30, 2019 · US
Image forming apparatus
US-2018081296-A1 · Mar 22, 2018 · US
Image forming apparatus
US-9846384-B2 · Dec 19, 2017 · US
Image forming apparatus
US-9720345-B2 · Aug 1, 2017 · US
Image forming apparatus
US-2016306289-A1 · Oct 20, 2016 · US
Image forming apparatus
US-2016238987-A9 · Aug 18, 2016 · US
Image forming apparatus
US-2015331386-A1 · Nov 19, 2015 · US