| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 6 | |
| #2 | United States | 5 | |
| #3 | Switzerland | 3 | |
| #4 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Measuring length, angles and areas | |
| #2 | Unspecified technologies | |
| #3 | Weighing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Rupley Frederick L | 5 |
| #2 | Engineering Company Merz | 3 |
| #3 | Rupley Frederick Landis | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2488037A | Pneumatically operated weigher and assorter | |
| US2490376A | Apparatus for gauging tapered workpieces | |
| US2501965A | Gauge head for cylindrical bores | |
| US2490375A | Pneumatic bore gauging head | |
| US2492656A | Air gauge | |
| CA463695A | Air gauge |