| Patents for G09B 21 - Teaching, or communicating with, the blind, deaf or mute (3,530) |
|---|
| 01/23/1979 | US4135316 Tape cassettes having indications for blind use |
| 10/10/1978 | US4119811 Photo-vibratory transducer |
| 10/10/1978 | US4119809 Braille lens for telephone dials |
| 09/26/1978 | CA1039200A1 Scanning systems |
| 08/22/1978 | US4108066 Device for printing braille |
| 05/30/1978 | US4092633 Condition sensor system and method |
| 02/21/1978 | US4075621 Hand held communication aid for the dumb |
| 02/21/1978 | US4074444 Method and apparatus for communicating with people |
| 02/14/1978 | US4073070 Coloring book for the blind |
| 12/20/1977 | US4063370 Tape cassettes having indications for blind use |
| 08/23/1977 | US4044350 Electromechanical transducer for relief display panel |
| 07/19/1977 | US4037200 Braille display switching matrix and circuit utilizing the same |
| 07/05/1977 | US4033053 Digital segment display to braille converter |
| 06/28/1977 | US4031640 Identification system |
| 06/07/1977 | US4027405 Record-reproduce device for flash cards |
| 05/24/1977 | US4025922 Traffic control system |
| 05/24/1977 | US4025732 Method and device for presenting information to deaf persons |
| 03/22/1977 | US4014016 Audio indicating system |
| 01/18/1977 | US4003143 Check writing guide |
| 01/04/1977 | US4000565 Digital audio output device |
| 11/23/1976 | US3993865 Scanning systems |
| 11/23/1976 | US3993407 Polysensory mobility aid |
| 10/19/1976 | US3987438 Tactile indicating device |
| 10/12/1976 | US3986030 Eye-motion operable keyboard-accessory |
| 10/05/1976 | US3984708 Electromagnetic tactile stimulator |
| 06/01/1976 | US3959894 Perceptual cells writing guide |
| 04/13/1976 | US3949492 Writing guide |
| 03/30/1976 | US3946504 Utterance training machine |
| 03/23/1976 | US3945934 Plastic microspheres, pigments, thermoadhesives |
| 01/13/1976 | US3932869 Tactile numeric display device |