POLYTECHNIC RES & DEV CO INC has a total of 14 patent applications. Its first patent ever was published in 1951. It filed its patents most often in United States, Germany and United Kingdom. Its main competitors in its focus markets basic communication technologies, measurement and electrical machinery and energy are TSIRONIS CHRISTOS, RACAL INSTRUMENTS LTD and KORBASHOV JURY MIKHAILOVICH.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 11 | |
#2 | Germany | 2 | |
#3 | United Kingdom | 1 |
# | Technology | |
---|---|---|
#1 | Measuring electric variables | |
#2 | Resonators | |
#3 | Tuning resonant circuits | |
#4 | Resistors | |
#5 | Magnets and transformers | |
#6 | Modulation | |
#7 | Waveguides | |
#8 | Devices for applying fluent materials | |
#9 | Generation of oscillations | |
#10 | Plasma technique |
# | Name | Total Patents |
---|---|---|
#1 | Samuel Hopfer | 3 |
#2 | Johnson Stanley A | 3 |
#3 | Hopfer Samuel | 2 |
#4 | Finke Herbert A | 2 |
#5 | Berger Christian D | 2 |
#6 | Sid Deutsch | 2 |
#7 | Lebowitz Robert A | 1 |
#8 | Alger Ferris E | 1 |
Publication | Filing date | Title |
---|---|---|
DE1117666B | Device for generating molecular beams for maser | |
DE1108800B | Measuring device for microwave power | |
US2949881A | Temperature-compensating indicators | |
US2912957A | Interpolating indicators | |
GB816066A | Improvements relating to t-junction standing wave indicator | |
US2933705A | Thermistor mounts | |
US3019386A | T-junction standing wave indicator | |
US2710383A | Standing wave indicator | |
US2816523A | Apparatus for vacuum coating electrical resistors | |
US2778941A | Wide range oscillator | |
US2798161A | Radio wave combination tuners | |
US2788447A | Radio wave tuners | |
US2771548A | Receiver tunable over v. h. f. and u. h. f. television bands | |
US2772355A | Wide range tuner |