Fred Cheng
22Patents
10h-index
11Co-inventors
72Inventor score
Filing activity: Feb 9, 1984 → Mar 27, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8799668B2 | Rubbing encryption algorithm and security attack safe OTP token | Electricity | 219 | Active |
| USD531626S1 | Antenna housing for a vending machine | General | 30 | Expired |
| US7231526B2 | System and method for validating a network session | Electricity | 26 | Expired |
| US7334255B2 | System and method for controlling access to multiple public networks and for controlling access to multiple private networks | Electricity | 25 | Expired |
| US5132556A | Bandgap voltage reference using bipolar parasitic transistors and MOSFET's in the current source | Physics | 22 | Expired |
| US7894938B1 | Vending machine service scheduling | Physics | 18 | Expired |
| US7325728B2 | Remote diagnosis and repair of vending machine communication failures | Physics | 18 | Expired |
| US4550424A | PM Decoder sample and hold circuit | Electricity | 16 | Expired |
| US7385504B2 | Vending machine door monitoring system | Physics | 13 | Expired |
| US5142219A | Switchable current-reference voltage generator | Electricity | 11 | Expired |
| US8103380B2 | Remote management of vending machines | Physics | 6 | Expired |
| US10837216B2 | Garage entry system and method | Fixed Constructions | 3 | Active |
| US10289152B1 | Interactive multimedia assistant device with a swappable personality customizable skin | Physics | 3 | Active |
| US4694501A | Nonsynchronous independent side band AM stereo decoder | Electricity | 1 | Expired |
| US9286588B2 | Vending machine service scheduling | Physics | 0 | Active |
| US7865936B2 | System and method for controlling access to multiple public networks and for controlling access to multiple private networks | Electricity | 0 | Active |
| US10832543B2 | Activity sensor | Physics | 0 | Active |
| US11523090B2 | Motion data extraction and vectorization | Physics | 0 | Active |
| US12260692B2 | Artificial intelligence-enabled activity detection and monitoring device | Physics | 0 | Active |
| US9842278B2 | Image analysis and orientation correction for target object detection and validation | Physics | 0 | Active |
| US8571705B2 | Vending machine service scheduling | Physics | 0 | Active |
| US10551871B2 | Interactive multimedia assistant device with a swappable personality customizable skin | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.