Audible signal valve knob
Audible vibratory reed assembly
Automatic fire alarm
Automatic flare signal apparatus
Automatic product depletion indicator
Bearing wear detecting device for canned motor driven pumps
Blockage indicator for internal combustion engine air cleaner el
Book marker employing endless elastic band
Bookmarker
Burglar alarm
Burglar alarm
Burglar alarm for doors
Clicker for indicating position of arrow
Coffee pot perk alarm
Coiled edge guide for rod-tube signal device and method
Command bar system
Condition change indicator
Control lever for generating a level sound
Cooking and whistling knob therefor
Cooking thermometer