Opposed Contacts Patents (Class 33/783)
- Differential screw (Class 33/814)
- With means for maintaining a constant or limited pressure on the contacts (Class 33/815)
- With wear compensation or backlash prevention means (Class 33/816)
- With lock (Class 33/817)
- With additional indicator (Class 33/818)
- With preliminary setting arrangement (Class 33/821)
- Inside measurement only (Class 33/827)
- With attachment (Class 33/828)
- With special scale markings (Class 33/830)
- Details (e.g., spindle or anvil adjustment, material (Class 33/831)