| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 5 | |
| #2 | United States | 5 | |
| #3 | United Kingdom | 4 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Mcfarlane James D | 10 |
| #2 | Patton Franklin D | 10 |
| Publication | Filing date | Title |
|---|---|---|
| CA1130195A | Combined piezo-meter and inclinometer casing | |
| GB2084217A | Casing for geological and geophysical surveys | |
| US4204426A | Measuring casing coupler apparatus | |
| US4254832A | Sampler and measurement apparatus | |
| US4192181A | Casing assembly probes | |
| US4230180A | Isolating packer units in geological and geophysical measuring casings | |
| US4258788A | CPI Casing |