| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 | |
| #2 | Canada | 7 | |
| #3 | France | 3 | |
| #4 | Austria | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Transport | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Vehicle wheels | |
| #3 | Rail vehicle suspensions | |
| #4 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Perkins Julius A | 12 |
| #2 | Perkins Julius Augustus | 5 |
| #3 | Camp Robert D | 2 |
| #4 | Camp Robert Deshon | 1 |
| #5 | Perkins J A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA99003A | Dust guard for bearings | |
| CA98089A | Roller bearings | |
| US821882A | Roller-bearing. | |
| US829086A | End-thrust-resisting means for bearings. | |
| US829085A | End-thrust-resisting means for bearings. | |
| US820986A | End-thrust bearing. | |
| CA78267A | Roller bearings | |
| CA78354A | Rolling bearing | |
| CA75274A | Roller bearing for shafts | |
| CA75273A | Roller bearings | |
| CA75272A | Roller bearings | |
| US713058A | Roller-bearing. | |
| US674635A | Dust-guard. | |
| US674122A | Roller-bearing. | |
| US667647A | Roller-bearing. | |
| US661769A | Sheet-metal cage for roller-bearings. | |
| US667633A | Roller-bearing. | |
| US691173A | Roller-bearing. | |
| US664822A | Antifriction roller-bearing. | |
| US664821A | Roller-bearing. |