| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 474/56 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 148,968 | Mar. 24, 1874 | W.C. Margedant | Improvement in expanding pulleys | industrial machine pulleys and belt drive mechanisms | |
| 389,276 | Sep. 11, 1888 | H.W. Andrews, J.L. Yuly | Expanding Pulley | industrial machine pulleys and belt drive mechanisms | |
| 1,496,032 | Jun. 03, 1924 | F.H. Sleeper | Pulley | friction clutches | |