| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 3 | |
| #2 | United Kingdom | 2 | |
| #3 | United States | 2 | |
| #4 | Germany | 1 | |
| #5 | France | 1 | |
| #6 | Italy | 1 | |
| #7 | Japan | 1 | |
| #8 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Testing of structures | |
| #2 | Measuring length, angles and areas | |
| #3 | Analysing materials | |
| #4 | Special measuring |
| # | Name | Total Patents |
|---|---|---|
| #1 | Beaver Ruby C | 3 |
| #2 | Wiers William C | 2 |
| #3 | Rubii Shii Biibaa | 1 |
| #4 | Sullins James R | 1 |
| #5 | Warren David A | 1 |
| #6 | Richardson Anthony Charles | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3974680A | Pipeline leak detector | |
| US3958451A | Ultrasonic inspection apparatus |