Bag with security clearance panel
US-2026097887-A1 · Apr 9, 2026 · US
Windows or other apertures, e.g. for viewing contents {(ventilation apertures B65D33/01; windows for level indication B65D33/004)}
Windows or other apertures, e.g. for viewing contents {(ventilation apertures B65D33/01; windows for level indication B65D33/004)} · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B65D33/04 |
| Official title | Windows or other apertures, e.g. for viewing contents {(ventilation apertures B65D33/01; windows for level indication B65D33/004)} |
| Display label | Windows or other apertures, e.g. for viewing contents {(ventilation apertures B65D33/01; windows for level indication B65D33/004)} |
| Total patents | 45 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 6 |
| 2020 | 4 |
| 2021 | 4 |
| 2022 | 8 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Transparent cellulosic packaging
US-2025242963-A1 · Jul 31, 2025 · US
Vacuum static service bag for servers
US-12295131-B2 · May 6, 2025 · US
Container with scrim window
US-12252307-B1 · Mar 18, 2025 · US
Flexible carrying case
US-11919691-B2 · Mar 5, 2024 · US
On-the-Go Cuff-First Glove Dispenser Soft Pack
US-2023303310-A1 · Sep 28, 2023 · US
Vacuum static service bag for servers
US-2023232602-A1 · Jul 20, 2023 · US
Accommodation body for absorbent article
US-2022362073-A1 · Nov 17, 2022 · US
Fruit and vegetable anti-fog packaging bag
US-11427390-B2 · Aug 30, 2022 · US
Dispenser and container
US-11357364-B2 · Jun 14, 2022 · US
Pouch for transportation and storage of natural materials
US-11352173-B2 · Jun 7, 2022 · US
Pouch for transportation and storage of natural materials
US-11332282-B2 · May 17, 2022 · US
Packages with raised portions
US-11299325-B2 · Apr 12, 2022 · US
3D/flip/motion photo-substrate, imaging processes, and applications thereof
US-11300714-B2 · Apr 12, 2022 · US
Flexible carrying case
US-2022048686-A1 · Feb 17, 2022 · US
Abrasion resistant film for biocontainers
US-11110684-B2 · Sep 7, 2021 · US
3d/flip/motion photo-substrate, imaging processes, and applications thereof
US-2021190997-A1 · Jun 24, 2021 · US
Dispenser and container
US-2021153699-A1 · May 27, 2021 · US
Dispenser and container
US-10898033-B2 · Jan 26, 2021 · US
Abrasion resistant film for biocontainers
US-2020262175-A1 · Aug 20, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B65D33/04?
- CPC B65D33/04 is the Cooperative Patent Classification code for “Windows or other apertures, e.g. for viewing contents {(ventilation apertures B65D33/01; windows for level indication B65D33/004)}.”
- How many patents are filed under CPC B65D33/04 (Windows or other apertures, e.g. for viewing contents {(ventilation apertures B65D33/01; windows for level indication B65D33/004)})?
- Our database includes 45 publications tagged with this CPC code.
- Is patent activity under CPC B65D33/04 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).