CHEUNG WILLIAM S H has a total of 11 patent applications. Its first patent ever was published in 1980. It filed its patents most often in United States, Canada and Australia. Its main competitors in its focus markets electrical machinery and energy, audio-visual technology and machines are AEROVOX WIRELESS CORP, COMET TECHNIK AG and AMERICAN TECH CERAMICS.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 7 | |
#2 | Canada | 2 | |
#3 | Australia | 1 | |
#4 | WIPO (World Intellectual Property Organization) | 1 |
# | Industry | |
---|---|---|
#1 | Electrical machinery and energy | |
#2 | Audio-visual technology | |
#3 | Machines | |
#4 | Surface technology and coating | |
#5 | Chemical engineering | |
#6 | Telecommunications | |
#7 | Transport | |
#8 | Consumer goods |
# | Technology | |
---|---|---|
#1 | Capacitors and switching devices | |
#2 | Unspecified technologies | |
#3 | Television | |
#4 | Layered products | |
#5 | Vehicle parts | |
#6 | Live-saving devices | |
#7 | Separation | |
#8 | Secret communication | |
#9 | Magnetic or electrostatic solid separation |
# | Name | Total Patents |
---|---|---|
#1 | Cheung William S H | 11 |
Publication | Filing date | Title |
---|---|---|
US2014150797A1 | Air purifier having an electret module | |
US2012118611A1 | Planar electrodes and a method of controlling spacing between electrodes | |
US2010116417A1 | Electronic component fabrication method using removable spacers | |
US2007281421A1 | Device and method for making air, gas or vacuum capacitors and other microwave components | |
AU2002351122A1 | A micro-gap gas filled dielectric capacitor | |
US4620226A | Apparatus for producing audio and visual signals for modulating a television system carrier signal | |
US4438752A | Vehicle ignition system | |
CA1155518A | Encoding of information |