Inspection openings or windows

Inspection openings or windows · Cooperative Patent Classification (CPC)

Separating, mixing, shaping, printing, and transporting materials.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeB65D75/522
Official title{Inspection openings or windows}
Display labelInspection openings or windows
Total patents78

Filing trend

Year-over-year patent counts classified under this CPC code.

Filing activity over the last five years is growing.

Patents filed per year
YearPatents
20154
20168
20179
201811
20196
20209
20215
20226
20237
20244
20258
20261

Representative patents

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.

Frequently asked questions

Answers are generated from the same data shown on this page.

What is CPC B65D75/522?
CPC B65D75/522 is the Cooperative Patent Classification code for “Inspection openings or windows.”
How many patents are filed under CPC B65D75/522 (Inspection openings or windows)?
Our database includes 78 publications tagged with this CPC code.
Is patent activity under CPC B65D75/522 growing?
Publication counts under this code: 4 in 2024 vs 8 in 2025 (latest complete years).