Solenoid fail-safe using current feedback as a diagnostic input

Solenoid plunger position detection algorithm

Solid state electronic pressure switch

Solid state relay having visual contact monitor

Solid state sensor for carbon monoxide

Solid state status indication circuit for power controllers

Solvent detector

Solvent responsive signal-carrying device

Son-air detector

Sonic building rescue beacon

Sonic detection system and method of using the same

Sonic detector having digital sampling circuit

Sonic temperature warning device for lids of cooking vessels

Sound alarm for protecting briefcases and the like

Sound emitting device for behavior modification

Sound generating device for firearm, bow or the like

Sound generating device for use by people with disabilities

Sound level alarm which ignores transient sounds

Sound level detector with program interrupt

Sound protecting headset with proximity collision avoidance...