CALLAND WILLIAMS FREDERIC has a total of 16 patent applications. Its first patent ever was published in 1944. It filed its patents most often in United States and United Kingdom. Its main competitors in its focus markets measurement, basic communication technologies and audio-visual technology are LEON BESS, VARELA ARTHUR A and ELECTRONIQUE & RADIO IND.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 15 | |
#2 | United Kingdom | 1 |
# | Industry | |
---|---|---|
#1 | Measurement | |
#2 | Basic communication technologies | |
#3 | Audio-visual technology | |
#4 | Telecommunications | |
#5 | Computer technology | |
#6 | Packaging and shipping | |
#7 | Mechanical elements |
# | Technology | |
---|---|---|
#1 | Radio navigation | |
#2 | Pulse technique | |
#3 | Television | |
#4 | Demodulation | |
#5 | Measuring electric variables | |
#6 | Antennas | |
#7 | Analogue computers | |
#8 | Clutches and brakes | |
#9 | Packaging | |
#10 | Wireless communication networks |
# | Name | Total Patents |
---|---|---|
#1 | Calland Williams Frederic | 15 |
#2 | Moody Norman F | 2 |
#3 | Llewelyn Arthur I | 1 |
#4 | Frank Moody Norman | 1 |
Publication | Filing date | Title |
---|---|---|
US2704809A | Wireless signalling systems | |
US2639419A | Electronic signal tracking circuits | |
US2549875A | Thermionic valve circuits | |
US2607913A | Radio navigation system | |
US2559834A | Radio scanner control | |
US2582894A | Wireless beacon system | |
US2490394A | Wireless signaling system | |
US2541627A | Wireless signaling system | |
US2555837A | Time base circuit arrangement | |
US2549874A | Electronic relay circuit arrangement | |
US2592777A | Pulse-echo identifying system | |
GB584329A | Improvements in or relating to circuits employing electron discharge devices |