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Class Information
Number: 340/721
Name: Communications: electrical >
Description:

Sub-classes under this class:

Class Number	Class Name	Patents
340/	Vehicle position indication (340/988)	0
340/	Land vehicle alarm or indicator (340/425.5)	0
340/	Condition responsive indicating system (340/500)	0
340/	Condition responsive indicating system (340/500)	0
340/	Condition responsive indicating system (340/500)	0
340/	Condition responsive indicating system (340/500)	0
340/	Condition responsive indicating system (340/500)	0
340/	Condition responsive indicating system (340/500)	0
340/	Condition responsive indicating system (340/500)	0
340/	Selective (340/825)	0
340/	Selective (340/825)	0
340/	Systems (340/286.01)	0
340/146.2	Digital comparator systems	410
340/286.01	Systems	119
340/310.11	Remote control over power line	503
340/384.1	Audible indication	235
340/407.1	Tactual indication	364
340/425.1	Repeater in unspecified type communications line or channel (e.g., relay station)	36
340/425.5	Land vehicle alarms or indicators	981
340/500	Condition responsive indicating system	331
340/815.4	Visual indication	430
340/825	Selective	204
340/850	Underwater	86
340/853.1	Wellbore telemetering or control (e.g., subsurface tool guidance, data transfer, etc.)	149
340/870.01	Continuously variable indicating (e.g., telemetering)	217
340/901	External condition vehicle-mounted indicator or alarm	460
340/906	Override of traffic control indicator by command transmitter	123
340/907	Traffic control indicator	365
340/932.2	Vehicle parking indicators	399
340/933	Vehicle detectors	660
340/944	Pedestrian guidance	85
340/945	Aircraft alarm or indicating systems	558
340/984	Watercraft alarm or indicating systems	164
340/988	Vehicle position indication	1,291
340/999	Miscellaneous	38