Bottle-type timer

Clock

Clock apparatus

Color changing hourglass assembly

Contactless-IC-card receive and read-write mechanism for an...

Counting device with ball actuated aligned rotatable indicating

Decorative hourglass with light reflecting base

Dual timer device

Dual timing apparatus

Elapsed time indicator

Game timer

Game timing apparatus

Granule flow timer

Hourglass construction

Hourglass novelty apparatus having unequal chamber volumes

Hourglass with bypass duct

Method of improving the function of an hour-glass

Multiple selectable timer

Quick reset game timer

Quickly resettable timer