| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 23 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Mechanical elements | |
| #3 | Machine tools | |
| #4 | Machines | |
| #5 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Railway brakes | |
| #3 | Rail vehicle suspensions | |
| #4 | Unspecified technologies | |
| #5 | Structural elements | |
| #6 | Punching metal | |
| #7 | Vehicle brake control systems | |
| #8 | Tools for connecting or disengaging | |
| #9 | Sawing | |
| #10 | Forging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Davis Nathan H | 25 |
| Publication | Filing date | Title |
|---|---|---|
| US1983122A | Brake beam and method of making the same | |
| US1182356A | Brake-beam-assembling machine. | |
| US1163741A | Reversible brake-beam strut. | |
| US1163742A | Brake-head. | |
| CA165073A | Brake shoe reinforcement | |
| US1028443A | Brake-beam suspension. | |
| US1043807A | Brake-head. | |
| US945758A | Air-brake apparatus. | |
| US863267A | Adjustable brake-head. | |
| US930460A | Beam-shaping press. | |
| US923954A | Metal-cutting apparatus. | |
| US1012334A | Apparatus for forming trusses or trussed beams. | |
| US863157A | Brake-beam. | |
| US863158A | Brake-beam. | |
| US822352A | Steel-back brake-shoe. | |
| US804933A | Beam-strut. | |
| US683730A | Brake-head. | |
| US683729A | Truss and brake-beam. | |
| US678379A | Truss. | |
| US678380A | Truss. |