INSTRUMENT PROTECTION DEVICES NAMELY

Brand	Owner	Address	Description
FANSTEEL	FANSTEEL METALLURGICAL CORPORATION	2200 SHERIDAN ROAD NORTH CHICAGO IL	INSTRUMENT PROTECTION DEVICES-NAMELY, THERMOMETER WELLS, BULB SHEATHS, AND DIAPHRAGMS FOR PROPORTIONING DEVICES FOR INTRODUCING CORROSIVE CHEMICALS INTO LIQUIDS;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A fingerboard (or fretboard) for use with a stringed instrument and light-system is disclosed and has a bottom surface adapted to mate or be attached to a neck of the instrument, and has wells extending from the bottom surface toward, but not through, a top surface. The wells are sized to receive a light-emitting device, such as LEDs, and are positioned along the fingerboard according to finger positions of the instrument. Illumination from the light-emitting devices is visible to a player of the instrument, however, when the devices are not illuminated, the fingerboard appears substantially as one made without the wells. The structure is useful for learning to play the instrument, while not appearing as a learning device.