Liquid crystal handwriting board, handwriting apparatus, and handwriting system
US-12504658-B2 · Dec 23, 2025 · US
Bistable or multi-stable liquid crystal cells (G02F1/141 takes precedence) · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G02F1/1391 |
| Official title | {Bistable or multi-stable liquid crystal cells (G02F1/141 takes precedence)} |
| Display label | Bistable or multi-stable liquid crystal cells (G02F1/141 takes precedence) |
| Total patents | 74 |
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 5 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 10 |
| 2021 | 3 |
| 2022 | 10 |
| 2023 | 4 |
| 2024 | 11 |
| 2025 | 16 |
| 2026 | 1 |
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
US-12504658-B2 · Dec 23, 2025 · US
US-2025258415-A1 · Aug 14, 2025 · US
US-2025060643-A1 · Feb 20, 2025 · US
US-2024371337-A1 · Nov 7, 2024 · US
US-12124148-B2 · Oct 22, 2024 · US
US-2024319530-A1 · Sep 26, 2024 · US
US-2024279551-A1 · Aug 22, 2024 · US
US-12066309-B2 · Aug 20, 2024 · US
US-2024272467-A1 · Aug 15, 2024 · US
US-12038667-B2 · Jul 16, 2024 · US
US-2024176178-A1 · May 30, 2024 · US
US-11994762-B2 · May 28, 2024 · US
US-11977302-B2 · May 7, 2024 · US
US-11899304-B2 · Feb 13, 2024 · US
US-2023185136-A1 · Jun 15, 2023 · US
US-11656526-B2 · May 23, 2023 · US
US-2023134866-A1 · May 4, 2023 · US
US-2023013031-A1 · Jan 19, 2023 · US
US-2022413337-A1 · Dec 29, 2022 · US
US-11520196-B2 · Dec 6, 2022 · US
Answers are generated from the same data shown on this page.