SPENCE LEWIS C has a total of 17 patent applications. Its first patent ever was published in 1969. It filed its patents most often in United States, Canada and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets basic communication technologies, measurement and telecommunications are PAGE IRVING H, ELECTROACUSTIC HECHT UND SCHMI and RADIO TRANSMISSION EQUIPMENT L.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 6 | |
#2 | Canada | 3 | |
#3 | WIPO (World Intellectual Property Organization) | 3 | |
#4 | Australia | 2 | |
#5 | EPO (European Patent Office) | 2 | |
#6 | United Kingdom | 1 |
# | Industry | |
---|---|---|
#1 | Basic communication technologies | |
#2 | Measurement | |
#3 | Telecommunications |
# | Technology | |
---|---|---|
#1 | Radio navigation | |
#2 | Resonators | |
#3 | Amplification control | |
#4 | Waveguides | |
#5 | Amplifiers | |
#6 | Automatic control of oscillations |
# | Name | Total Patents |
---|---|---|
#1 | Spence Lewis C | 15 |
#2 | Martin Stephen J | 3 |
#3 | Spence L C | 1 |
#4 | Martin Stephen | 1 |
#5 | Martin S J | 1 |
Publication | Filing date | Title |
---|---|---|
US4739333A | Single channel distance measuring receiver system and method | |
US4692715A | Constant frequency signal generator circuit and method | |
GB8515420D0 | Distance measuring receiver system and method | |
CA1155531A | Dual continuous wave carrier signals distance measuring system | |
WO8300563A1 | Continuous wave carrier signals distance measuring system and method | |
WO8204167A1 | Band-pass filter and gain stage | |
CA1168321A | Band-pass filter and gain stage | |
US4283726A | Dual frequency distance measuring system | |
US4268807A | Band-pass filter and gain stage | |
US4182996A | Magnetic R.F. power splitter and power combiner | |
US3681705A | Circuit and method for enhancement of signal-noise ratio |