| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | WIPO (World Intellectual Property Organization) | 2 | |
| #4 | Australia | 1 | |
| #5 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Pipes | |
| #4 | Venting or aerating devices | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lafleur Karl K | 15 |
| #2 | Wade Donald R | 4 |
| #3 | Donald R Wade | 3 |
| #4 | Lafleur Kark K | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2005000695A1 | Filling and circulating apparatus for subsurface exploration | |
| US6510867B2 | Pressure relief valve | |
| US5433270A | Cementing plug | |
| US5348351A | Coupling apparatus | |
| US5242018A | Cementing plug | |
| US5152554A | Coupling apparatus |