Inventor
Johnson Chen
Inventor
Walnut, CA, US
Overview
Patents· 47 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
LOC14primary
LOC1439%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution6%
C09KMaterials for miscellaneous applications, not provided for elsewhere5%
F28DHeat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact5%
LOC105%
LOC195%
Y10TTechnical subjects covered by former us classification5%
C07CAcyclic or carbocyclic compounds3%
E04CStructural elements3%
F24SSolar heat collectors3%
PatentTitleYear
8,683,719'LED illumination footwear'20148,573,880'Fitting suite'20137,297,813'Removal of alkyl alkanesulfonate esters from alkanesulfonic acids and other organic media'2007D0547137'Cutter for cheese'2007D0541797'Memory stick with flashlight and retractable USB plug'2007D0541796'Memory stick with retractable USB plug'2007D0539813'MP3 player'2007D0531161'Digital FM scan radio with talking alarm clock and talking pedometer'2006D0527477'USB flashlight'2006D0521509'USB memory stick'20066,930,296'Apparatus, method and system for food management and food inventory'2005D0503628'Alarm clock with stopwatch'2005D0502693'Digital FM scan radio with alarm clock and pedometer'2005D0502216'USB memory stick with pen'2005D0497638'Light pen'2004D0497179'Light pen with stylus for PDA'2004D0496344'Digital FM scan radio with alarm clock and pedometer'2004D0496022'Alarm clock radio'2004D0495679'Alarm clock radio'2004D0495680'Alarm clock radio'2004D0489706'FM auto scan radio'2004D0486139'Digital FM auto scan radio with alarm clock'2004D0486137'AM/FM radio with siren and light'2004D0486138'Digital FM auto scan radio with alarm clock'2004D0483346'Digital alarm clock radio'2003D0483347'Wobble alarm clock radio'2003D0479833'Wobble radio'2003D0477585'Motion display radio'2003D0477306'Radio'2003D0468288'FM/AM radio'2003D0467186'Motion display clock'2002D0467185'Motion display clock'2002D0461789'Clock radio'2002D0456383'FM radio'2002D0455729'Calendar clock radio with alarm and stopwatch'2002D0453924'Radio'20026,238,057'Combination light pen'2001D0437842'Shower radio'2001D0432516'Shower radio with clock'20006,124,497'Preparation of alkane sulfonic acids and sulfonyl chlorides by oxidation of alkanethiols and dialkyl disulfides'20005,690,519'Underwater propulsive device'19975,178,404'Contraction controller for collapsible type contractible baggage cart'19934,678,552'Selective electrolytic stripping of metal coatings from base metal substrates'19874,513,053'Encapsulated phase change thermal energy storage materials and process'19854,505,953'Method for preparing encapsulated phase change materials'19854,504,402'Encapsulated phase change thermal energy _storage materials'19854,292,189'Thermal energy storage composition comprising sodium sulfate decahydrate; sodium carbonate decahydrate; and sodium tetraborate decahydrate'1981Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1981–1987Patents assigned to PENNWALT CORP (5)· patent assignee history
1985–2007Based in King of Prussia, PA, US· patent location history
1993–2014Patents assigned to CHEN JOHNSON (5)· patent assignee history
2000Patents assigned to INNOCHEM INC (1)· patent assignee history
2000–2007Based in Taipei, TW· patent location history
2002–2007Patents assigned to UNITIME INTERNAT CO LTD (22)· patent assignee history
2002–2007Based in Walnut, CA, US· patent location history
2007Patents assigned to ARKEMA INC (1)· patent assignee history
2013Based in Mercer Island, WA, US· patent location history
2014Based in Dongguan, CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| UNITIME INTERNAT CO LTD | 22 | 2002–2007 |
| CHEN JOHNSONself | 5 | 1993–2014 |
| PENNWALT CORP | 5 | 1981–1987 |
| ARKEMA INC | 1 | 2007 |
| INNOCHEM INC | 1 | 2000 |
Locations
| Location | Patents | Span |
|---|---|---|
| Walnut, California, US | 31 | 2002–2007 |
| King of Prussia, Pennsylvania, US | 6 | 1985–2007 |
| Taipei, TW | 3 | 2000–2007 |
| Dongguan, CN | 1 | 2014 |
| Mercer Island, Washington, US | 1 | 2013 |