Control method of an automatic inside-diameter measuring apparatus and an automatic measuring apparatus
US-12590794-B2 · Mar 31, 2026 · US
Plug gauges
Plug gauges · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01B3/26 |
| Official title | Plug gauges |
| Display label | Plug gauges |
| Total patents | 33 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 5 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gap measuring device
US-12540809-B2 · Feb 3, 2026 · US
Inside-diameter measuring unit, floating joint mechanism unit, and measuring unit
US-12392595-B2 · Aug 19, 2025 · US
Gauge apparatus, system and method
US-11982177-B2 · May 14, 2024 · US
Gap measuring device
US-2024068794-A1 · Feb 29, 2024 · US
Apparatus and method for determining borehole size with a borehole imaging tool
US-11815352-B2 · Nov 14, 2023 · US
Inside-diameter measuring unit, floating joint mechanism unit, and measuring unit
US-2023304784-A1 · Sep 28, 2023 · US
Control method of an automatic inside-diameter measuring apparatus and an automatic measuring apparatus
US-2023304785-A1 · Sep 28, 2023 · US
Spacer tool
US-11731717-B2 · Aug 22, 2023 · US
Plug gauge and associated method for sealing the same
US-11346644-B2 · May 31, 2022 · US
Gauge apparatus, system and method
US-2022155048-A1 · May 19, 2022 · US
Right-angle touch gauge
US-11105602-B2 · Aug 31, 2021 · US
Spacer tool
US-2021261209-A1 · Aug 26, 2021 · US
Apparatus and method for determining borehole size with a borehole imaging tool
US-2021239448-A1 · Aug 5, 2021 · US
Plug gauge and associated system and method for taking multiple simultaneous diametric measurements
US-10982976-B2 · Apr 20, 2021 · US
Plug gauge and associated method for sealing the same
US-2020284571-A1 · Sep 10, 2020 · US
Plug gauge and associated system and method for taking multiple simultaneous diametric measurements
US-2020271481-A1 · Aug 27, 2020 · US
Comprehensive thread checking fixture
US-10551160-B2 · Feb 4, 2020 · US
Right-angle touch gauge
US-2020003537-A1 · Jan 2, 2020 · US
Comprehensive thread checking fixture
US-2019195608-A1 · Jun 27, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01B3/26?
- CPC G01B3/26 is the Cooperative Patent Classification code for “Plug gauges.”
- How many patents are filed under CPC G01B3/26 (Plug gauges)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC G01B3/26 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).