| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Basic materials chemistry | |
| #4 | Macromolecular chemistry and polymers | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Pipes | |
| #3 | Macromolecular compounds compositions | |
| #4 | Materials for miscellaneous applications | |
| #5 | Venting or aerating devices | |
| #6 | Coating compositions | |
| #7 | Nails | |
| #8 | Adhesives | |
| #9 | Unspecified technologies | |
| #10 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Rector Laurence L | 16 |
| #2 | Cron Charles L | 3 |
| #3 | Hilton Lewis D | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3177013A | Dual string suspension assembly | |
| US2709091A | Locking screw for well head | |
| US2471010A | Sealing compositions containing chlorinated diphenyl and graphite | |
| US2593793A | Ram-type tubing head | |
| US2367376A | Coating composition | |
| US2367375A | Sealing composition | |
| US2354929A | Means for landing and supporting well tubings | |
| US2159401A | Casing head | |
| US2231221A | Packing device | |
| US2083091A | Joint seal | |
| US2139207A | Packing device | |
| US2092261A | Tubing head for wells | |
| US2083090A | Casing head | |
| US2083089A | Tubing head | |
| US1834968A | Casing and tubing head suspension | |
| CA514966A | Ram-type tubing heads |