| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 28 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Machine tools | |
| #5 | Electrical machinery and energy | |
| #6 | Packaging and shipping | |
| #7 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Pipes | |
| #4 | Making forged metal products | |
| #5 | Shaping of plastics | |
| #6 | Containers for goods storage | |
| #7 | Metal wire processing | |
| #8 | Venting or aerating devices | |
| #9 | Pumps | |
| #10 | Cables and insulators |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spang Ferdinand J | 28 |
| #2 | Anderson Ray B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2508693A | Process and apparatus for forging cable tool drill bits | |
| US2483944A | Swivel rope socket | |
| US2476434A | Float valve | |
| US2373061A | Device for determining the condition of a well bore from an etched acid bottle | |
| US2342498A | Drilling bit | |
| US2313178A | Plug for oil and gas wells | |
| US2264775A | Well casing elevator | |
| US2300438A | Well packer | |
| US2255829A | Safety drilling-in head | |
| US2214683A | Hydraulic pump pulsation absorbing device | |
| US2196538A | Apparatus for cementing wells | |
| US2143746A | Packing element | |
| US2216462A | Method and apparatus for die forging drill bits | |
| US2136597A | Packer | |
| US2106859A | Hook wall packer | |
| US2141419A | Multiple packer | |
| US2021206A | Well packer | |
| US1999706A | Coupling | |
| US1978847A | Rotary jar | |
| US2017994A | Pipe joint |