| VARIAC GENERAL RADIO COMPANY
71342803 23 Oct 1933 | on 19 Dec 1994 | TRANSFORMERS,TRANSFORMERS Class 021 Class 021 Houseware and Glass Products TRANSFORMERS | | | STROBOLUME GENERAL RADIO COMPANY
72319595 19 Feb 1969 | on 04 Nov 1992 | HIGH INTENSITY STROBOSCOPIC LIGHT FLASH PRODUCING APPARATUS-NAMELY, ST... Class 026 Class 026 Lace, Ribbons & Embroidery and Fancy Goods HIGH INTENSITY STROBOSCOPIC LIGHT FLASH PRODUCING APPARATUS-NAMELY, STROBOSCOPES | | | GR 874 GENERAL RADIO COMPANY
72254273 12 Sep 1966 | on 03 Nov 1992 | COAXIAL ELECTRICAL CONNECTORS, POWER DIVIDERS, AND IMPEDANCE TERMINATI... Class 021 Class 021 Houseware and Glass Products COAXIAL ELECTRICAL CONNECTORS, POWER DIVIDERS, AND IMPEDANCE TERMINATIONS | | | GENERAL RADIO CO. GENERAL RADIO COMPANY
71533497 21 Aug 1947 | on 03 Nov 1992 | STANDARD UNITS OF RESISTANCE, INDUCTANCE AND CAPACITANCE FOR USE IN EL... Class 021 Class 021 Houseware and Glass Products STANDARD UNITS OF RESISTANCE, INDUCTANCE AND CAPACITANCE FOR USE IN ELECTRIC MEASURING CIRCUITS; ELECTRICAL BRIDGE CIRCUITS OF THE DECADE, SLIDE-WIRE, DISSIPATION-FACTOR, VACUUM-TUBE-CHARACTERISTIC, CAPACITANCE RESISTANCE AND INDUCTANCE TYPES AND ACCESSORY ELECTRIC CIRCUITS AND COMPONENTS REQUIRED FOR OPERATION WITH THE BRIDGE CIRCUITS; VOLTAGE METERS, OHMMETERS, d'ARSONVILLE METERS, GALVANOMETERS, WAVEMETERS, METERS FOR MEASURING CAPACITY IMPEDANCE, MODULATION, SOUND - LEVEL, NOISE, VIBRATION, DISTORTION, RATE, AUDIBILITY, FREQUENCY AND POWER, AND METERS OF THE HOT-WIRE, HETERODYNE AND OTHER TYPES AND ACCESSORY ELECTRIC CIRCUITS AND COMPONENTS REQUIRED FOR OPERATION WITH THE METERS; ELECTRIC INTERPOLATION APPARATUS; INDUSTRIAL ELECTRONIC STROBOSCOPIC AND OTHER INSTRUMENTS-NAMELY, MOTION-PICTURE RECORDING APPARATUS AND FRAMES, CAMERAS, TRIPODS, INSTRUMENT - CARRYING CASES, LENSES AND ELECTRIC FLASH LAMPS; WAVE-FORM VIBRATION, AND SOUND MEASURING INSTRUMENTS AND ANALYZERS; CALIBRATION, VACUUM-TUBE AND OTHER PRECISION FORKS; VOLTAGE AND CURRENT MULTIPLIERS; SPECIAL MEASURING INSTRUMENTS FOR MAKING MEASUREMENTS AT AUDIO AND RADIO FREQUENCIES; MEASURING NETWORKS; STANDARD-SIGNAL GENERATORS AND OSCILLATORS; OSCILLOSCOPES, GAMMA-RAY AND BETA-RAY COUNTERS; FREQUENCY STANDARDS AND MONITORS; AND RANGE-EXTENSION UNITS. Class 026 Class 026 Lace, Ribbons & Embroidery and Fancy Goods ELERICAL APPARATUS-NAMELY, AUDIO AND RADIO GENERATORS, OSCILLATORS, DETECTOR ASSEMBLIES AND CIRCUITS, RECTIFIERS AND DIRECT AND ALTERNATING-CURRENT AMPLIFIERS; VOLTAGE, CURRENT AND ELECTRONIC POWER-SUPPLY SYSTEMS; VIBRATION PICK-UPS FOR GENERATING VOLTAGES IN RESPONSE TO MECHANICAL VIBRATIONS; AUDIO-FREQUENCY AND RADIO-FREQUENCY TRANSFORMERS; CONNECTORS, INSULATORS, BINDING POSTS, SWITCHES, CONTACTORS, CONTACT MEMBERS, KNOBS, SOCKETS, RHEOSTATS, POTENTIOMETERS FOR USE IN RADIO AND SIMILAR APPARATUS, RESISTORS, ATTENUATORS AND VOLTAGE DIVIDERS; CAPACITORS, INDUCTORS AND CHOKES; ELECTRIC AND ELECTRONIC CONTROL BOXES AND MOTOR-SPEED CONTROL CIRCUITS; RADIO AND OTHER DIALS FOR USE ON ELECTRICAL COMPONENTS AND INSTRUMENTS; ELECTRO-MECHANICAL HUMMER OSCILLATORS; PIEZOELECTRIC CRYSTALS; ELECTRIC FILTERS; ELECTRIC CABLES; CATHODE-RAY TUBES; TRANSMISSION-LINE PHASE, INSERTION AND TERMINAL UNITS; AND TUNED ELECTRIC CIRCUITS FOR SUPPRESSING HARMONICS AND OTHER FREQUENCY COMPONENTS, NOISE AND HUM. | | | GR GENERAL RADIO COMPANY
71533499 22 Aug 1947 | on 03 Nov 1992 | STANDARD UNITS OF RESISTANCE, INDUCTANCE AND CAPACITANCE FOR USE IN EL... Class 021 Class 021 Houseware and Glass Products ELECTRICAL APPARATUS NAMELY, AUDIO AND RADIO GENERATORS, OSCILLATORS, DETECTOR ASSEMBLIES AND CIRCUITS, RECTIFIERS AND DIRECT AND ALTERNATING-CURRENT AMPLIFIERS; VOLTAGE, CURRENT AND ELECTRONIC POWER-SUPPLY SYSTEMS; VIBRATION PICK-UPS FOR GENERATING VOLTAGES IN RESPONSE TO MECHANICAL VIBRATIONS; AUDIO-FREQUENCY AND RADIO-FREQUENCY TRANSFORMERS; CONNECTORS, INSULATORS, BINDING POSTS, SWITCHES, CONTACTORS, CONTACT MEMBERS, KNOBS, SOCKETS, RHEOSTATS, POTENTIOMETERS FOR USE IN RADIO AND SIMILAR APPARATUS, RESISTORS, ATTENUATORS AND VOLTAGE DIVIDERS; CAPACITORS, INDUCTORS AND CHOKES; ELECTRIC AND ELECTRONIC CONTROL BOXES AND MOTOR-SPEED CONTROL CIRCUITS; RADIO AND OTHER DIALS FOR USE ON ELECTRICAL COMPONENTS AND INSTRUMENTS; ELECTRO-MECHANICAL HUMMER OSCILLATORS; PIEZO-ELECTRIC CRYSTALS; ELECTRIC FILTERS; STORAGE AND DRYCELL BATTERIES; ELECTRIC CABLES; CATHODE-RAY TUBES; TRANSMISSIONLINE PHASE, INSERTION AND TERMINAL UNITS; AND TUNED ELECTRIC CIRCUITS FOR SUPPRESSING HARMONICS AND OTHER FREQUENCY COMPONENTS, NOISE AND HUM Class 026 Class 026 Lace, Ribbons & Embroidery and Fancy Goods STANDARD UNITS OF RESISTANCE, INDUCTANCE AND CAPACITANCE FOR USE IN ELECTRIC MEASURING CIRCUITS; ELECTRICAL BRIDGE CIRCUITS OF THE DECADE, SLIDE-WIRE, DISSIPATION-FACTOR, VACUUM-TUBE-CHARACTERISTIC, CAPACITANCE, RESISTANCE AND INDUCTANCE TYPES AND ACCESSORY ELECTRIC CIRCUITS AND COMPONENTS REQUIRED FOR OPERATION WITH THE BRIDGE CIRCUITS; VOLTMETERS, OHMMETERS, D'ARSONVILLEMETERS, GALVANOMETERS, WAVEMETERS, METERS FOR MEASURING CAPACITY, IMPEDANCE, MODULATION, SOUND-LEVEL, NOISE, VIBRATION, DISTORTION, RATE, AUDIBILITY, FREQUENCY AND POWER, AND METERS OF THE HOT-WIRE, HETERODYNE AND OTHER TYPES AND ACCESSORY ELECTRIC CIRCUITS AND COMPONENTS REQUIRED FOR OPERATION WITH THE METERS; ELECTRIC INTERPOLATION APPARATUS; INDUSTRIAL ELECTRONIC STROBOSCOPIC AND OTHER INSTRUMENTS NAMELY, MOTION-PICTURE RECORDING APPARATUS AND FRAMES, CAMERAS, TRIPODS, INSTRUMENT-CARRYING CASES, LENSES AND ELECTRIC FLASH LAMPS; WAVE-FORM, VIBRATION, AND SOUND-MEASURING INSTRUMENTS AND ANALYZERS; CALIBRATION, VACUUM-TUBE AND OTHER PRECISION FORKS; VOLTAGE AND CURRENT MULTIPLIERS; SPECIAL MEASURING INSTRUMENTS FOR MAKING MEASUREMENTS AT AUDIO AND RADIO FREQUENCIES; MEASURING NET-WORKS; STANDARD-SIGNAL GENERATORS AND OSCILLATORS; OSCILLOSCOPES, GAMMA-RAY AND BETA-RAY COUNTERS; FREQUENCY STANDARDS AND MONITORS; AND RANGE-EXTENSION UNITS | | | FASTRAK GENERAL RADIO COMPANY
72278684 21 Aug 1967 | on 03 Nov 1992 | RECORDING PENS, MARKERS AND ASSOCIATED CARTRIDGE, FOR USE WITH GRAPHIC... Class 026 Class 026 Lace, Ribbons & Embroidery and Fancy Goods RECORDING PENS, MARKERS AND ASSOCIATED CARTRIDGE, FOR USE WITH GRAPHIC RECORDING EQUIPMENT AND THE LIKE | | | SYNCRONOMETER GENERAL RADIO COMPANY
72117778 13 Apr 1961 | on 10 Oct 1987 | APPLIANCES FOR THE PRECISE MEASUREMENT OF TIME AND ELECTRICAL FREQUENC... Class 026 Class 026 Lace, Ribbons & Embroidery and Fancy Goods APPLIANCES FOR THE PRECISE MEASUREMENT OF TIME AND ELECTRICAL FREQUENCY | | | SYNCRONOMETER GENERAL RADIO COMPANY
72117777 13 Apr 1961 | on 10 Oct 1987 | PRECISION ELECTRIC CLOCKS,PRECISION ELECTRIC CLOCKS Class 027 Class 027 Floor Covering products PRECISION ELECTRIC CLOCKS | | | GR900 GENERAL RADIO COMPANY
72226528 26 Aug 1965 | on 27 Sep 1987 | ELECTRICAL TRANSMISSION LINE COMPONENTS INCLUDING COAXIAL CABLE CONNEC... Class 021 Class 021 Houseware and Glass Products ELECTRICAL TRANSMISSION LINE COMPONENTS INCLUDING COAXIAL CABLE CONNECTORS; CONNECTOR ADAPTORS, FLANGES, PLUGS AND JACKS; OPEN-CIRCUIT, RESISTIVE AND SHORT-CIRCUIT TERMINATION CONNECTORS; TRANSMISSION LINE MATCHING AND STANDING WAVE TUNERS; PRECISION AIR TRANSMISSION LINE AND STANDARD IMPEDANCE LINE SECTIONS; SLOTTED LINES; TRANSMISSION LINE CONNECTOR KITS; PRECISION INNER- AND OUTER-CONDUCTOR RODS AND TUBES; AND TRANSMISSION LINE COUPLING TOOLS AND HARDWARE | | | STROBOLUX GENERAL RADIO COMPANY
71493486 18 Dec 1945 | on 08 Mar 1987 | STROBOSCOPES,STROBOSCOPES Class 026 Class 026 Lace, Ribbons & Embroidery and Fancy Goods STROBOSCOPES | |