| 1/00 | Details of instruments |
| 1/02 | Details of instruments Housings |
| 1/04 | Details of instruments Special adaptations of driving means |
| 1/07 | Details of instruments Indicating devices, e.g. for remote indication |
| 1/08 | Details of instruments Indicating devices, e.g. for remote indication Arrangements of scales, pointers, lamps, or acoustic indicators, e.g. in automobile speedometers |
| 1/10 | Details of instruments Indicating devices, e.g. for remote indication Arrangements of scales, pointers, lamps, or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds |
| 1/11 | Details of instruments Indicating devices, e.g. for remote indication Arrangements of scales, pointers, lamps, or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by the detection of the position of the indicator needle |
| 1/12 | Details of instruments Recording devices |
| 1/14 | Details of instruments Recording devices for permanent recording |
| 1/16 | Details of instruments Recording devices for erasable recording, e.g. magnetic recording |
| 3/00 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) |
| 3/02 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) Devices characterised by the use of mechanical means |
| 3/04 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) Devices characterised by the use of mechanical means by comparing two speeds |
| 3/06 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) Devices characterised by the use of mechanical means by comparing two speeds using a friction gear |
| 3/08 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) Devices characterised by the use of mechanical means by comparing two speeds using differential gearing |
| 3/10 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) Devices characterised by the use of mechanical means by actuating an indicating element, e.g. pointer, for a fixed time |
| 3/12 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) Devices characterised by the use of mechanical means by making use of a system excited by impact |
| 3/14 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) Devices characterised by the use of mechanical means by exciting one or more mechanical resonance systems |
| 3/16 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) Devices characterised by the use of mechanical means by using centrifugal forces of solid masses |
| 3/18 | Measuring linear or angular speed; Measuring differences of linear or angular speeds (
G01P 5/00-G01P 11/00 take precedence) Devices characterised by the use of mechanical means by using centrifugal forces of solid masses transferred to the indicator by mechanical means |