Sheldon Chang
58Patents
15h-index
21Co-inventors
84Inventor score
Filing activity: Mar 13, 1989 → Dec 15, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7074018B2 | Direct drive linear flow blood pump | Human Necessities | 121 | Expired |
| US6361292B1 | Linear flow blood pump | Human Necessities | 42 | Expired |
| US5233623A | Integrated semiconductor laser with electronic directivity and focusing control | Electricity | 40 | Expired |
| US10616239B2 | Geo-fence authorization provisioning | Electricity | 40 | Active |
| US10893055B2 | Geo-fence authorization provisioning | Electricity | 35 | Active |
| US5820354A | Cascaded progressing cavity pump system | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US7029433B2 | Device for cardiac restoration | Human Necessities | 28 | Expired |
| US5019764A | Portable laser scanning system and scanning methods having a resonant motor control circuit | Physics | 25 | Expired |
| US10133918B1 | Generating a mood log based on user images | Physics | 24 | Active |
| US9754355B2 | Object recognition based photo filters | Physics | 23 | Active |
| US10285001B2 | Generation, curation, and presentation of media collections | Electricity | 20 | Active |
| US10061977B1 | Determining a mood for a group | Physics | 18 | Active |
| US11216869B2 | User interface to augment an image using geolocation | Physics | 18 | Active |
| US10824654B2 | Geolocation-based pictographs | Electricity | 15 | Active |
| US9978125B1 | Generating and distributing image filters | Physics | 15 | Active |
| US11627141B2 | Geo-fence authorization provisioning | Electricity | 13 | Active |
| US5331455A | Electrical pulse operated laser sampling light amplifier | Electricity | 13 | Expired |
| US5477379A | Electrical pulse operated laser sampling light amplifier | Electricity | 12 | Expired |
| US10203855B2 | Customized user-controlled media overlays | Physics | 11 | Active |
| US10679389B2 | Methods and systems for generation, curation, and presentation of media collections | Physics | 10 | Active |
| US10726603B1 | Animated expressive icon | Electricity | 9 | Active |
| US11902287B2 | Geo-fence authorization provisioning | Electricity | 8 | Active |
| US6305110A | Interchangable modular programmable neon sign | Physics | 8 | Expired |
| US10496875B1 | Determining a mood for a group | Physics | 7 | Active |
| US10157449B1 | Geo-location-based image filters | Physics | 6 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.