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| Patents for G08B 21 - Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for (34,716) |
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| 09/14/1976 | US3980987 Brake failure indicator | | 08/17/1976 | US3975723 Door alert system and magnetic switch therefor | | 07/20/1976 | US3971008 Crane overload detector using a boom bending moment detector | | 07/13/1976 | US3969712 Pool alarm | | 05/25/1976 | US3959789 Credit card monitor | | 05/25/1976 | US3959787 Refrigeration alarm | | 05/11/1976 | US3956742 Mooring load sensor | | 04/27/1976 | US3953844 Incipient fire detector | | 04/27/1976 | US3953843 Swimming pool alarm | | 04/13/1976 | US3950155 Automatic air-purifying system | | 03/16/1976 | US3944969 Central warning apparatus for vehicles | | 03/02/1976 | US3942167 Immersion responsive sensor | | 02/10/1976 | US3938126 Handbag alarm system | | 01/20/1976 | US3933240 Anti-theft security container | | 01/20/1976 | US3933231 Automatic workshop installation | | 01/06/1976 | US3931619 Overtemperature monitor and integrator apparatus |
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