Apparatus For Measuring Unknown Time Intervals By Mechanical Means [g04f 7/00] Patents (Class 968/831)

Cross-Reference Art Collections

By measuring the distance of fall or the final velocity of a falling body [g04f 7/02] (Class 968/832)
Using a mechanical oscillator [g04f 7/04] (Class 968/833)
Means used apart from the timepiece for starting or stopping same [g04f 7/10] (Class 968/836)

There are no patents to show for this class.