Inventor

HE DUANFENG

US109 patents

⚠️ This page may combine multiple inventors who share the name “HE DUANFENG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HE DUANFENG

SYMBOL TECHNOLOGIES INC

Portable instrument for electro-optically reading indicia and for projecting a bit-mapped color image

Optical code reader for producing video displays and measuring physical parameters of objects

Autodiscrimination and line drawing techniques for code readers

Bar code reader for reading both one dimensional and two dimensional symbologies with programmable resolution

System and method for verifying RFID reads

Portable instrument for electro-optically reading indicia and for projecting a bit-mapped color image

Optical code reader for measuring physical parameters of objects

Autodiscrimination and line drawing techniques for code readers

Techniques for reading two dimensional code, including MaxiCode

Techniques for reading postal code

Techniques for reading two dimensional code, including maxicode

Pulsed illumination in imaging reader

Measurement of dimensions of solid objects from two-dimensional image(s)

Imaging engine and method for code readers

Swipe imager scan engine

System and method for illuminating and reading optical codes imprinted or displayed on reflective surfaces

Method of processing an analog electrical signal containing information representative of reflected light from coded indicia, wherein the electrical signal contains edge transitions

Techniques for reading two dimensional code, including maxicode

Optical scanners having dual surface optical elements for dual working ranges

Imaging bar code reader with single prism focus adjustment

Methods and apparatus for dynamic signal processing

Ambient light shield and color filter for imaging-based bar code reader

Method of authenticating products using hardware compatibility flag

Electro-optically reading direct part markings on workpieces by image capture

System and method for verifying optical character recognition of optical code reads

System and method for an image capturing network

Point-of-transaction workstation for electro-optically reading one-dimensional and two-dimensional indicia by image capture

Processing image data from multiple sources

Zero-footprint camera-based point-of-sale bar code presentation scanning system

System and method for illuminating and reading optical codes imprinted or displayed on reflective surfaces

Miniature imager

Optical code reader for producing video displays

Error correction in macro bar code symbols

Semi-retroreflective scanners

Swipe imager scan engine

Method of authenticating products using analog and digital identifiers

Configurable operating system for control of a mobile I/O device

Configurable operating system having multiple data conversion applications for I/O connectivity

Linearization of raster patterns in 2D optical scanners

Error correction in macro bar code symbols

Scanner for product authentication

Imaging-based bar code reader utilizing modified rolling shutter operation

Compact autofocus bar code reader with moving mirror

Bar code scanning decoding

Method and apparatus for extending the range of a product authentication device

Barcode scanner decoding

Method and apparatus for error detection

NCR CO

Bar code enhancement system and method for vision scanners

CHINESE ACADEMY OF SCIENCES

Identification system using computer generated moire

HE DUANFENG

Imaging-based scanner including border searching for image acquisition