Richard D Wu

US Patent:

54990084, Mar 12, 1996

Filed:

Apr 11, 1994

Appl. No.:

8/226127

Inventors:

Evelyn Rosenkrantz - Sherman Oaks CA
Richard Wu - Fullerton CA

International Classification:

G08B 300

US Classification:

3403847

Abstract:

An apparatus is provided for providing artificial sounds in the vicinity of a toilet. It includes a housing attachable in the vicinity of a toilet and an electronic sound system which is contained within the housing and is activatable by a user of the toilet so as to block out the noise of eliminating. The sound system includes a speech processing microprocessor for providing an electronic signal representing a desired sound. A memory storage device is connected to the speech processing microprocessor for electronically storing a digital representation of the desired sound to be processed by the speech processing microprocessor. A counter is connected to the memory storage device. The counter has a clock for generating an address for the speech processing microprocessor. A variable resister is attached to the speech processing microprocessor for controlling a rate of the clock, and thereby controlling the quality of the desired sound. A switch is connected to the speech processing microprocessor for turning on the desired sound.

US Patent:

20210207787, Jul 8, 2021

Filed:

Oct 11, 2020

Appl. No.:

17/067744

Inventors:

- Los Angeles CA, US
Elizabeth Rodgers - Long Beach CA, US
Paul Pickard - Acton CA, US
Sana Ashraf - Glendale CA, US
Xin Zhang - Los Angeles CA, US
Richard Wu - Morgan Hill CA, US
Raghuram L.V. Petluri - Cerritos CA, US

International Classification:

F21V 7/04
F21V 5/10
F21V 9/38
F21V 13/14

Abstract:

Lighting system including bowl reflector, visible-light source, central reflector, and optically-transparent body. Bowl reflector has central axis, and rim defining emission aperture, and first visible-light-reflective surface defining portion of cavity in bowl reflector. First visible-light-reflective surface includes parabolic surface. Visible-light source is located in cavity and configured for generating visible-light emissions from semiconductor light-emitting device. Central reflector includes second visible-light-reflective surface, having convex flared funnel shape and having first peak facing toward visible-light source. Optically-transparent body has first base being spaced apart from second base and having side wall extending between first and second bases. Concave flared funnel-shaped surface of second base faces toward convex flared funnel-shaped second visible-light reflective surface of central reflector. First base includes central region having convex paraboloidal-shaped surface and second peak facing toward visible-light source.