Absorption depletion indicators for anesthetic gas administratio

Ageing indicator

Apparatus for indicating whether the interior of a container has

Ball valve apparatus having a moisture indicator

Chemically sensitive warning apparatus and method

Colorimetric gas dosimeter

Critical temperature indicating device

Device and method for detection/indication of liquid leakage

Device for detecting the presence of a chemical contaminant

Device for sugar and/or caffeine content indication

Device use indicator

Diffusion controlled security tags

Dynamic current interruption-type indicators and method therefor

Elapsed time indicator

Elapsed time indicator for controlled environments and...

Flexible porous web having a permanent humidity sensor for indic

Humidity indicator

Humidity indicator

Indicator device for soil

Indicator for display of elapsed times and/or of the moment when