| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Germany | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Brazil | 1 | |
| #5 | Canada | 1 | |
| #6 | Switzerland | 1 | |
| #7 | France | 1 | |
| #8 | Ireland | 1 | |
| #9 | Italy | 1 | |
| #10 | Japan | 1 | |
| #11 | Netherlands | 1 | |
| #12 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Machine tools | |
| #3 | Packaging and shipping | |
| #4 | Civil engineering | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Making screws | |
| #3 | Earth drilling | |
| #4 | Cranes | |
| #5 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hixson Claude M | 5 |
| #2 | Hixson Claude Morris | 2 |
| #3 | Hinderliter Donald R | 2 |
| #4 | Stoops Bobby G | 2 |
| #5 | Kuroodo Moorisu Hitsukususon | 1 |
| #6 | Hixson C | 1 |
| #7 | Hebard Harry D | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4130304A | Well head seal assembly | |
| IE43051B1 | Improvements in or relating to a method and apparatus for forming sheaves | |
| US4039220A | Latch for hoisting hook | |
| IT1058972B | Hot rolled pulley wheel forming machine - with heated disc rotated and periphery deformed by half round edge | |
| US4018469A | Gate latching mechanism for hoist hook | |
| US4000634A | Method and apparatus for forming a sheave from a flat disc of metal | |
| GB809145A | Improvements in or relating to combination well head |