| 1/00 | Spring motors (spring-driven toys A63H; springs in general F16F; precision time mechanisms, e.g. for clocks or watches, G04B) |
| 1/02 | Spring motors (spring-driven toys A63H; springs in general F16F; precision time mechanisms, e.g. for clocks or watches, G04B) characterised by shape or material of spring, e.g. helical, spiral, coil |
| 1/04 | Spring motors (spring-driven toys A63H; springs in general F16F; precision time mechanisms, e.g. for clocks or watches, G04B) characterised by shape or material of spring, e.g. helical, spiral, coil using rubber springs |
| 1/06 | Spring motors (spring-driven toys A63H; springs in general F16F; precision time mechanisms, e.g. for clocks or watches, G04B) Other parts or details |
| 1/08 | Spring motors (spring-driven toys A63H; springs in general F16F; precision time mechanisms, e.g. for clocks or watches, G04B) Other parts or details for winding |
| 1/10 | Spring motors (spring-driven toys A63H; springs in general F16F; precision time mechanisms, e.g. for clocks or watches, G04B) Other parts or details for producing output movement other than rotary, e.g. vibratory |
| 3/00 | Other motors, e.g. gravity or inertia motors |
| 3/02 | Other motors, e.g. gravity or inertia motors using wheels with circumferentially-arranged compartments co-operating with solid falling bodies (F03G 3/04 takes precedence) |
| 3/04 | Other motors, e.g. gravity or inertia motors driven by sand or like fluent solid material |
| 3/06 | Other motors, e.g. gravity or inertia motors using pendulums |
| 3/08 | Other motors, e.g. gravity or inertia motors using flywheels |
| 4/00 | Devices for producing mechanical power from geothermal energy |
| 4/02 | Devices for producing mechanical power from geothermal energy with direct fluid contact |
| 4/04 | Devices for producing mechanical power from geothermal energy with deep-well turbo-pump |
| 4/06 | Devices for producing mechanical power from geothermal energy with fluid flashing |
| 5/00 | Devices for producing mechanical power from muscle energy (driving cycles B62M) |
| 5/02 | Devices for producing mechanical power from muscle energy (driving cycles B62M) of endless-walk type, e.g. treadmills |
| 5/04 | Devices for producing mechanical power from muscle energy (driving cycles B62M) of endless-walk type, e.g. treadmills Horsemills or the like |
| 5/06 | Devices for producing mechanical power from muscle energy (driving cycles B62M) other than of endless-walk type |
| 5/08 | Devices for producing mechanical power from muscle energy (driving cycles B62M) other than of endless-walk type for combined actuation by different limbs, e.g. hand and leg |