DR. DOUGLAS ROBERT WILLIAMS, O.D.
Optometry at Warner Ave, Huntington Beach, CA
License number
California OP4927
Category
Optometry
Type
Optometrist
License number
California OP4927
Category
Optometry
Type
Corneal and Contact Management
License number
California OP4927
Category
Optometry
Type
Low Vision Rehabilitation
License number
California OP4927
Category
Optometry
Type
Pediatrics
License number
California OP4927
Category
Optometry
Type
Occupational Vision
Address
Address
6042 Warner Ave, Huntington Beach, CA 92647
Phone
(714) 847-6059
(714) 847-6050 (Fax)
(714) 847-6050 (Fax)
Personal information
See more information about DOUGLAS ROBERT WILLIAMS at radaris.comName
Address
Phone
4877 Canopy Ln, Oakley, CA 94561
4784 Baxter St, Santa Barbara, CA 93110
5042 Avenida Del Sol, Laguna Woods, CA 92637
42 Crestview Dr, Orinda, CA 94563
4629 Marconi Ave APT 117, Sacramento, CA 95821
Professional information
See more information about DOUGLAS ROBERT WILLIAMS at trustoria.com
Douglas R Williams, Huntington Beach CA - OD (Doctor of Optometry)
Douglas R Williams, Huntington Beach CA - OD (Doctor of Optometry)
Specialties:
Low Vision Rehabilitation, Cornea & Contact Management, Occupational Optometry, Optometry, Pediatric Optometry
Address:
6042 Warner Ave, Huntington Beach 92647
(714) 847-6059 (Phone), (714) 847-6050 (Fax)
(714) 847-6059 (Phone), (714) 847-6050 (Fax)
Languages:
English
Electro-Acoustical Structure
Electro-Acoustical Structure
US Patent:
4395589, Jul 26, 1983
Filed:
Jul 6, 1981
Appl. No.:
6/280650
Inventors:
Douglas J. Williams - Huntington Beach CA
Assignee:
EECO Incorporated - Santa Ana CA
International Classification:
H04R 110
US Classification:
179 1SW
Abstract:
An electro-acoustical structure for switching on and supplying sound to an all-acoustical headset upon the insertion of an acoustic-use plug. A piston-valve is depressed against a spring upon the insertion of the plug, opening acoustic ports, and also moving a bifurcated contact attached to the piston to close a circuit with coactive stationary contacts for energizing an electro-acoustic transducer.