| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 49 | |
| #2 | Canada | 24 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Materials and metallurgy | |
| #3 | Machines | |
| #4 | Machine tools | |
| #5 | Transport | |
| #6 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Foundry moulding | |
| #3 | Casting metal | |
| #4 | Shaping of plastics | |
| #5 | Unspecified technologies | |
| #6 | General building constructions | |
| #7 | Railway bodies | |
| #8 | Unspecified technologies | |
| #9 | Punching metal |
| # | Name | Total Patents |
|---|---|---|
| #1 | Pettis Clifton D | 73 |
| Publication | Filing date | Title |
|---|---|---|
| US1820490A | Brake shoe | |
| US1787547A | Brake-shoe construction | |
| US1684883A | Brake shoe and method of making the same | |
| US1707492A | Mold | |
| US1650297A | Brake shoe | |
| US1752308A | Apparatus for molding | |
| US1650296A | Brake shoe | |
| US1542643A | Mold and method of molding | |
| US1542642A | Mold | |
| US1688350A | Method of molding | |
| US1542641A | Permanent casting mold | |
| US1542640A | Permanent casting mold | |
| US1540278A | Brake shoe | |
| US1542639A | Casting mold | |
| US1503514A | Brake shoe | |
| US1488513A | Brake shoe | |
| US1542638A | Casting mold | |
| US1542637A | Casting mold | |
| US1866599A | Casting mold | |
| US1455353A | Casting mold |