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Class Number: 341 Class Title: CODED DATA GENERATION OR CONVERSION Subclass Subclass Number Title 1 DIGITAL PATTERN READING TYPE CONVERTER 2 .Plural denominationally related carriers (e.g., coarse/fine geared discs) 3 .Plural types of codes on single carrier 4 .According to nonlinear function 5 .For X or Y coordinate determination (e.g., stylus-pad) 6 .With directional discrimination 7 .Antiambiguity feature 8 .Real and complementary patterns 9 .Having combined (e.g., denominational, combination code) coding pattern 10 ..Constant distance code 11 .Incremental 12 .Cathode ray 13 .Optical 14 ..Having optical waveguide 15 .Magnetic, inductive or capacitive 16 .Brush and contacts or conductive pattern 17 .Actuated by physical projection 20 BODILY ACTUATED CODE GENERATOR 21 .For handicapped user 22 .Including keyboard or keypad 23 ..Variable key legends 24 ..With error prevention means (e.g., debounce, antichatter) 25 ...With rollover feature (i.e., antidoublestrike) 26 ..With particular key scanning feature 27 ..With audible or tactile indicator 28 ..For pictorial or ideographic characters (e.g., design, chinese or japanese characters) 29 ..With variable pulse spacing or grouping 30 ..For numerical pulse type transmission 31 ..Photoelectric actuation 32 ..Magnetic or inductive actuation 33 ..Capacitive actuation 34 ..Pressure sensitive actuation 35 .With rotary dial 50 DIGITAL CODE TO DIGITAL CODE CONVERTERS 51 .Adaptive coding 52 .To or from particular bit symbol 53 ..Bit represented by pulse width 54 ..Bit represented by discrete frequency 55 .Substituting specified bit combinations for other prescribed bit combinations 56 .To or from multi-level codes 57 ..Binary to or from ternary 58 .To or from minimum d.c. level codes 59 .To or from run length limited codes 60 .To or from packed format 61 .Data rate conversion 62 .BCD (binary-coded-decimal) to or from decimal 63 .To or from bit count codes 64 .To or from number of pulsess 65 ..To or from Huffman codes 66 ..To or from Morse code 67 .To or from variable length codes 68 .To or from NRZ (nonreturn-to-zero) codes 69 ..Return-to-zero to or from NRZ (nonreturn-to-zero) codes 70 ..To or from bi-phase level code (e.g., split phase code, Manchester code) 71 ..To or from bi-phase space or mark codes (e.g., double frequency code, FM code) 72 ..To or from delay modulation code (e.g., Miller code, three frequency code, MFM code) 73 ..To or from coded mark inversion 74 ..To or from double density code 75 .To or from nonlinear codes 76 .To or from differential codes 77 ..To or from delta modulation codes 78 .Programmable structure 79 .Tree structure 80 .To or from fibonacci codes 81 .To or from interleaved format 82 .To or from mixed code formats 83 .To or from mixed base codes 84 ..Binary to BCD (binary-coded decimal) 85 ..BCD (binary-coded decimal) to binary 86 .Generator runs until new code is generated 87 .Unnecessary data suppression 88 .Multiple conversions using same converter 89 .Reversible converters 90 .To or from alphanumeric code formats 91 ..To or from Baudot code 92 ..To or from Hollerith code 93 .Complementers 94 .With error detection or correction 95 .Byte length changed 96 .To or from constant distance codes 97 ..Gray to binary 98 ..Binary to Gray 99 .To or from display device codes 100 .Serial to parallel 101 .Parallel to serial 102 .To or from "N" out of "M" codes 103 .."N" out of "M" to "X" out of "Y" 104 .Binary to decimal 105 .Decimal to binary 106 .Coding by table look-up techniques 107 .To or from code based on probability 108 REVERSIBLE ANALOG TO DIGITAL CONVERTERS 109 STOCHASTIC TECHNIQUES 110 ANALOG TO DIGITAL CONVERSION FOLLOWED BY DIGITAL TO ANALOG CONVERSION 111 PHASE OR TIME OF PHASE CHANGE 112 .Synchro or resolver signal 113 ..Coarse and fine 114 ..Control system 115 ..Converter compensation 116 ..Analog resolver or synchro signal to digital signal 117 ..Digital signal to analog resolver or synchro signal 118 CONVERTER COMPENSATIONN 119 .Temperature compensation 120 CONVERTER CALIBRATION OR TESTING 121 .Trimming control circuits 122 SAMPLE AND HOLD 123 .Having variable sampling rate 124 .Sampled and held input signal with linear return to datum 125 .Sampled and held input signal with nonlinear return to datum 126 ANALOG TO OR FROM DIGITAL CONVERSION 127 .Bipolar 128 ..Dual slope analog to digital converter 129 ..Plural slope analog to digital converter 130 .Difunction code as output 131 .Increasing converter resolution (e.g., dithering) 132 .Detecting analog signal peak 133 .With particular solid state devices (e.g., Gunn effect device, Josephson device, drift transistor, using solid state active devices as impedances) with other at longer intervals) 134 ..Integrated injection logic 135 ..Current mirror 136 ..Field effect transistor 137 .Using optical device, (e.g., fiber optics, cathode ray tubes) 138 .Nonlinear 139 ..Automatic control for increasing converter range (e.g., gain ranging, automatic gain control) 140 ..Linearization (e.g., nonlinear transfer characteristic compensates for nonlinear transducer) 141 .Multiplex 142 .Converter is part of control loop 143 .Differential encoder and/or decoder (e.g., delta modulation, differential pulse code modulation) 144 .Digital to analog conversion 145 ..Coarse and fine conversions 146 ..Serial conversion 147 ..Function generator 148 ..Tree structure 149 ..Using magnetic or cryogenic components 150 ..Using charge coupled devices or switched capacitances 151 ..Analog output represents a displacement or force 152 ..With intermediate conversion of digital value to time interval 153 ..Using weighted impedances 154 ..Using ladder network 155 .Analog to digital conversion 156 ..Coarse and fine conversions 157 ..Intermediate conversion to frequency or number of pulses 158 ..Analog input compared with static reference 159 ...Parallel type 160 ....Including priority encoder 161 ...Acting sequentially 162 ...Serial conversions with change in signal 163 ...Recirculating 164 ...Single comparator and counter 165 ...Single comparator and digital storage 166 ..Intermediate conversion to time interval 167 ...Dual slope 168 ...Plural slope 169 ...Input signal compared with linear ramp 170 ...Input signal compared with nonlinear rampp 171 ..Using magnetic or cryogenic components 172 ..Using charge transfer devices (e.g., charge coupled devices, charge transfer by switched capacitances) 173 CODE GENERATOR OR TRANSMITTER 174 .Plural transmitters 175 .With code display at transmitter 176 .Transmitter for remote control signal 177 .Producing different pulse frequencies 178 .With variable pulse spacing or grouping 179 ..Plural pulse shapes 180 ..Plural channels 181 ..Carrier frequency variation 182 ..With variable pulse length 183 ..Pulse presence or absence in equal length code 184 .Numerical pulse type 185 ..Multistage 186 ..With gaseous or space discharge device 187 ..Having counter or register 188 ..Serial pulse number actuation 189 ..Pulse gating 190 ..Mechanical switch feature 191 .With gaseous or space discharge device feature 192 .With rotary distributor 200 QUANTIZER 899 MISCELLANEOUS