Receiver or analog modulated signal frequency converter > Patents

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Class Information
Number: 455/130
Name: Telecommunications > Receiver or analog modulated signal frequency converter
Description: Apparatus comprising (a) means for receiving a carrier wave, upon which an information signal has been modulated, and deriving the original information signal from the modulated carrier wave. Further means may be provided for converting the derived signal into a physical manifestation readily perceived by at least one of the human senses (e.g., sound) or (b) devices whereby an incoming carrier wave signal, which has been modulated by an analog signal, is changed from one carrier frequency to another carrier frequency.

Sub-classes under this class:

Class Number	Class Name	Patents
455/347	Cabinet, housing, or chassis structure	361
455/203	Carrier and single sideband	66
455/344	Combined with diverse art device	394
455/142	Convertible to different type (e.g., am to fm)	97
455/201	Exalted carrier	1
455/131	Frequency conversion between signal source (e.g., wave collector) and receiver	118
455/313	Frequency modifying or conversion	373
455/205	Frequency or phase modulation	140
455/230	Local control of receiver operation	48
455/226.1	Measuring or testing of receiver	670
455/295	Modulation distortion or cross talk correction or elimination	241
455/296	Noise or interference elimination	955
455/145	Panoramic display	14
455/149	Plural output (e.g., plural speakers) (not stereo)	15
455/132	Plural receivers	301
455/352	Remote control of receiver	168
455/227	Responsive to an input signal of particular predetermined frequency	85
455/150.1	Signal selection based on frequency (e.g., tuning)	139
455/218	Squelch	90
455/202	Suppressed carrier	43
455/204	Vestigial sideband	39
455/334	With particular receiver circuit	223
455/217	With protection circuit for receiver circuit	70
455/269	With wave collector (e.g., antenna)	111

Patents under this class:

1 2 3 4 5

Patent Number	Title Of Patent	Date Issued
4044303	Microwave radiation detector	Aug. 23, 1977
4034299	Audio signal quality indicator	Jul. 5, 1977
3955050	System for audibly recognizing an aurally unclassifiable signal	May. 4, 1976
3937004	Portable miniature type information treating device	Feb. 10, 1976