Johnson Chen
50Patents
15h-index
9Co-inventors
77Inventor score
Filing activity: Jul 30, 1979 → May 31, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD539813S1 | MP3 player | General | 106 | Expired |
| US4504402A | Encapsulated phase change thermal energy _storage materials | Emerging Cross-Sectional Technologies | 98 | Expired |
| US4513053A | Encapsulated phase change thermal energy storage materials and process | Emerging Cross-Sectional Technologies | 66 | Expired |
| US4505953A | Method for preparing encapsulated phase change materials | Emerging Cross-Sectional Technologies | 64 | Expired |
| US4678552A | Selective electrolytic stripping of metal coatings from base metal substrates | Electricity | 41 | Expired |
| USD502216S1 | USB memory stick with pen | General | 40 | Expired |
| USD541796S1 | Memory stick with retractable USB plug | General | 31 | Expired |
| US5178404A | Contraction controller for collapsible type contractible baggage cart | Performing Operations; Transporting | 28 | Expired |
| USD521509S1 | USB memory stick | General | 26 | Expired |
| USD527477S1 | USB flashlight | General | 23 | Expired |
| USD541797S1 | Memory stick with flashlight and retractable USB plug | General | 22 | Expired |
| USD503628S1 | Alarm clock with stopwatch | General | 22 | Expired |
| USD497179S1 | Light pen with stylus for PDA | General | 18 | Expired |
| US6930296B2 | Apparatus, method and system for food management and food inventory | Human Necessities | 18 | Expired |
| USD437842S | Shower radio | General | 16 | Expired |
| USD456383S1 | FM radio | General | 13 | Expired |
| USD497638S1 | Light pen | General | 13 | Expired |
| US4292189A | Thermal energy storage composition comprising sodium sulfate decahydrate; sodium carbonate decahydrate; and sodium tetraborate decahydrate | Chemistry; Metallurgy | 13 | Expired |
| USD489706S1 | FM auto scan radio | General | 13 | Expired |
| US6238057A | Combination light pen | Performing Operations; Transporting | 12 | Expired |
| USD467186S1 | Motion display clock | General | 12 | Expired |
| USD453924S1 | Radio | General | 12 | Expired |
| US5690519A | Underwater propulsive device | Electricity | 11 | Expired |
| USD496344S1 | Digital FM scan radio with alarm clock and pedometer | General | 11 | Expired |
| USD432516S | Shower radio with clock | General | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.