| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Siphons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Crickmer Charles S | 15 |
| #2 | Lamb Roy A | 5 |
| #3 | Glitsch Hans C | 4 |
| #4 | Lane John J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2254060A | Packing element | |
| US2256704A | Flow device | |
| US2184636A | Well flowing device | |
| US2207118A | Flow valve | |
| US2136674A | Well packer | |
| US2184635A | Flow valve | |
| US2243308A | Flow valve | |
| US2184634A | Packing element | |
| US2182251A | Packing material | |
| US2203957A | Flow valve | |
| US2132723A | Packing element | |
| US2144833A | Well flowing apparatus | |
| US2143055A | Valve | |
| US2131275A | Slip mounting | |
| US2131274A | Packer |