| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 19 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Mechanical elements | |
| #3 | Machine tools | |
| #4 | Machines | |
| #5 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Containers for goods storage | |
| #3 | Making screws | |
| #4 | Punching metal | |
| #5 | Unspecified technologies | |
| #6 | Unspecified technologies | |
| #7 | Soldering, welding and flame cutting | |
| #8 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Unke Herman A | 22 |
| Publication | Filing date | Title |
|---|---|---|
| US2467709A | Thread protector | |
| US2523930A | Thread protector | |
| US2369381A | Welding ring | |
| US2182906A | Threading tool | |
| US2245419A | Threaded thin-walled article | |
| US2156169A | Threaded hollow article | |
| US2054182A | Method and apparatus for threading hollow metal articles | |
| US1920449A | Pipe joint | |
| US1941235A | Thread protector | |
| US1949923A | Apparatus for forming lugs in thread protectors | |
| US1853944A | Protector | |
| US1853945A | Thread protector | |
| US1853946A | Thread protector | |
| US1783893A | Pipe-end protector | |
| US1776528A | Thread protector | |
| US1783892A | Thread protector | |
| US1724117A | Method of forming beaded articles | |
| US1648973A | Pipe-thread protector | |
| US1621647A | Pipe-thread protector | |
| CA472720A | End closures for tubular members |