Habit cessation aide
Hand held athletic officiating timers
Hand held decimal timer with improved frequency division
Hand rotating mechanism for electronic watch
High frequency signal measurement method and apparatus
High precision delay measurement circuit
High resolution and high accuracy time interval generator
High resolution data acquisition
High resolution time interpolator
High resolution time interpolator
High resolution timer using low resolution counter
High-resolution electronic chronometry system
Hourglass construction
Hourglass novelty apparatus having unequal chamber volumes
Hourglass with bypass duct