| 474 / | HD | ENDLESS BELT POWER TRANSMISSION SYSTEMS OR COMPONENTS |
| 237 | DF | FRICTION DRIVE BELT {14} |
| 253 | ![]() | .~ Including particular means connecting opposite ends to form loop {2} |
| 254 | DF | .~.~> Connected by adhering surface on one end to surface on other end (e.g., by adhesive, heat, seal, etc.) |
| 255 | DF | .~.~> Including discrete connector {3} |