74170642
May 20, 1991
Oct 10, 1995
telephones with special adaptations for use by handicapped persons with hearing, speech, visual and motion impairments; namely, speaker phones with programmable dialing; telephones with large key pads; telephones with adjustable noise frequency and noise reduction features; and telephones activated by blowing of air or whistling, and cordless telephones activated by blowing of air or whistling
Electrical and Scientific Apparatus