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Class Information
Number: 333
Name: Wave transmission lines and networks >
Description: A. GENERAL STATEMENT OF THE CLASS SUBJECT MATTER










Class Number Class Name No. of Patents
333/14

Amplitude compression and expansion systems (i.e., companders)

225
333/23

Artificial lines

33
333/81R

Attenuators

400
333/81A

Coaxial or microstrip

193
333/81B

Waveguide type

70
333/17.1

Automatically controlled systems

217
333/17.3

Impedance matching

336
333/17.2

Limiting of amplitude

114
333/18

With control of equalizer and/or delay network

490
333/24R

Coupling networks

309
333/25

Balanced to unbalanced circuits

261
333/26

Having long line elements

643
333/24C

Capacitive coupling

158
333/138

Delay lines including a lumped parameter

101
333/140

Physical structure

70
333/139

Variable parameter

132
333/141

Delay lines including elastic bulk wave propagation means

56
333/146

Helical propagation path

7
333/148

Including magnetostrictive transducers

64
333/142

Multipath propagation

31
333/143

Spurious signal reduction

29
333/145

Nonuniform propagation path

17
333/147

Propagation path has significant chemical or physical properties

46
333/149

Significant transducer structure

45
333/144

Variable delay

20
333/150

Delay lines including elastic surface wave propagation means

182
333/153

Including discontinuities within propagation means

145
333/154

Significant transmitting or receiving transducer structure

234
333/151

Spurious signal or mode cancellation means

133
333/155

Temperature stabilization or compensation

58
333/152

Variable delay

53
333/156

Delay lines including long line elements

257
333/160

Coaxial line

66
333/164

Control of delay with semiconductive means

247
333/162

Helical line structures and lines developed from a helical structure

38
333/163

Having plural concentric helices

4
333/161

Planar line structure (e.g., stripline)

371
333/157

Waveguide

114
333/159

Having mechanically movable delay control means

41
333/158

Including ferrite means

36
333/186

Electromechanical filter

312
333/201

Magnetostrictive wave transmission path

24
333/197

Plural mechanically coupled bar, plate, or rod-type resonating means

149
333/198

Plural interresonator coupling paths

38
333/199

Plural mechanically coupled disk resonators

32
333/200

Reed- or fork-type resonators

129
333/187

Using bulk mode piezoelectric vibrator

448
333/189

Plural coupled vibrators

511
333/190

Lattice structure

51
333/191

Monolithic structure

155
333/192

With electrical coupling

85
333/188

With means for varying response

138
333/193

Using surface acoustic waves

1065
333/194

Including spurious signal prevention or reduction means

317
333/196

With response weighting means

349
333/195

With wave-modifying means (e.g., reflectors, resonators, diffractors, multistrip couplers, etc.)

886
333/28R

Equalizers

402
333/28T

Audio tone control

95
333/167

Frequency domain filters utilizing only lumped parameters

226
333/170

Bridge type

31
333/171

With variable response

22
333/185

Having significant physical structure

941
333/168

Including recurrent sections

72
333/172

Rc or rl type

269
333/175

Resonant, discrete frequency selective type

349
333/176

Including specific frequency rejection means

185
333/181

Smoothing type (e.g., direct current power supply filters or decoupling filters)

350
333/182

Feedthrough type

194
333/183

Resiliently mounted components

43
333/184

Monolithic structure

163
333/173

Synchronous filters

161
333/177

Transformer coupled

210
333/178

Including bandwidth adjusting, shaping, or stabilization means

23
333/179

With permeability tuning means

3
333/180

With variable coupling means

11
333/169

Wheatstone or lattice type

8
333/174

With variable response

278
333/165

Frequency or time domain filters and delay lines utilizing charge transfer devices

229
333/27

Interlinking long line

19
333/24.1

Nonreciprocal gyromagnetic type (e.g., directional phase shifters)

126
333/24.2

Nonreciprocal attenuators or isolators

330
333/24.3

Nonreciprocal polarization rotators

19
333/166

Time domain filters

203
333/202

Wave filters including long line elements

1108
333/206

Coaxial

552
333/207

Tunable

215
333/203

Digital structure

193
333/204

Stripline or microstrip

886
333/205

Tunable

273
333/208

Waveguide

248
333/212

Including directly coupled resonant sections

242
333/210

Including evanescent guide sections

52
333/211

Including frequency selective absorbing means

31
333/209

Tunable

156
333/32

With impedance matching

566
333/33

Having long line elements

780
333/35

Quarter-wave transformer type

92
333/34

Tapered

269
333/19

Differentiating or integrating systems

27
333/22R

Dissipating terminations for long lines

211
333/22F

Fluid-cooling

30
333/218

Frequency multipliers

75
333/245

Long line elements and components

185
333/260

Connectors and interconnections

433
333/261

Rotary coupling

67
333/263

Including variable impedance

132
333/246

Strip type

930
333/247

Semiconductor mounts

489
333/262

Switch

376
333/248

Waveguide elements and components

439
333/250

Active element mounting

67
333/249

Bend

52
333/254

Connectors and interconnections

159
333/256

Movable

32
333/257

In line

34
333/255

Quick disconnect

21
333/253

Including variable impedance

37
333/251

Mode suppressor

120
333/258

Switch

66
333/259

Mechanically movable

16
333/252

Window

108
333/236

Long lines

86
333/237

Leaky lines

81
333/243

Shielded type

162
333/244

Including spaced, electrically compensated, internal support means

60
333/238

Strip type

683
333/239

Waveguide type

222
333/242

Circular or helical structure

55
333/241

Flexible

31
333/240

Surface wave

31
333/99R

Miscellaneous

42
333/99MP

Multipactor applications

19
333/99PL

Plasma

80
333/99S

Superconductive

319
333/213

Negative resistance or reactance networks of the active type

61
333/216

Having negative impedance

40
333/217

Providing negative resistance

63
333/214

Simulating specific type of reactance

100
333/215

Using gyrator

65
333/16

Pilot current-controlled systems

29
333/15

Pilot line-controlled systems

8
333/1

Plural channel systems

256
333/100

Having branched circuits

186
333/132

For providing frequency separation

313
333/133

Utilizing electromechanical transducer

539
333/134

Utilizing long line element

536
333/135

Including waveguide element

199
333/117

Including hybrid-type network

183
333/123

Having coaxial element

23
333/120

Having hybrid ring junction

62
333/121

Having hybrid-t (e.g., magic-t)

40
333/122

Using waveguide

49
333/118

Having lumped parameters or impedances

61
333/119

Using transformer coil

66
333/136

Including long line element

211
333/137

Using waveguide

222
333/101

Including switching means

380
333/102

Having gyromagnetic operating means

17
333/105

Having mechanical switching means

194
333/108

For waveguide

58
333/106

Using rotary switching means

46
333/107

For tem lines

16
333/103

Having semiconductor operating means

379
333/104

Using tem lines

229
333/109

Using directional coupler

314
333/111

For providing adjustable coupling

68
333/110

For providing frequency separation

66
333/114

Having crossed-guide waveguide

24
333/112

Having lumped parameters or impedances

105
333/113

Having parallel-guide waveguide

114
333/115

Having tem lines

61
333/116

Using stripline

395
333/124

With impedance matching

198
333/129

For providing frequency separation

169
333/125

Including long line element

265
333/126

For providing frequency separation

274
333/127

Using tem lines

144
333/128

Stripline

261
333/131

Using coupled windings

78
333/130

Using resistors only

15
333/1.1

Nonreciprocal gyromagnetic type (e.g., circulators)

457
333/2

With automatic control

8
333/3

Line substitution

4
333/4

With balanced circuits

106
333/5

Plural balanced circuits

79
333/13

Resonator-type breakdown discharge systems (e.g., t-r or r-t systems)

43
333/219

Resonators (distributed parameter type)

597
333/227

Cavity resonator

137
333/230

With coupling

233
333/228

With mode suppressor

36
333/229

With temperature compensation

66
333/231

With tuning

90
333/232

Having movable element

121
333/233

Using movable wall

33
333/222

Coaxial or shielded

269
333/223

With tuning

102
333/224

Having movable element

50
333/225

Using movable shorting means

11
333/226

Using plunger, rod, or piston

45
333/219.1

Dielectric type

441
333/219.2

Magnetic type

108
333/220

Open wire or lecher line

7
333/221

With tuning

10
333/234

Temperature compensated

118
333/235

With tuning

409
333/12

Transmission line inductive or radiation interference reduction systems

650
333/21R

Wave mode converters

218
333/21A

Polarization converters

389
333/20

Wave-shaping

135
 
 
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