Inventor

KEITHLEY DOUGLAS G

US102 patents

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

KEITHLEY DOUGLAS G

MARVELL INT LTD

Semi-volatile NAND flash memory

USB isochronous data transfer for a host based laser printer

Method and apparatus for dynamically generating a stochastic threshold table

Semi-volatile NAND flash memory

Direct memory access controller with multiple transaction functionality

Horizontal strip column-first two-dimensional scaling

Apparatus and method to generate a horizontal synchronization signal for a printer

Method and apparatus for reducing noise in a scanned image while minimizing loss of detail in the scanned image

Method and apparatus for selective use of wear-leveling to store data in a memory

Method and apparatus for performing color plane

Mechanical galvanometer tilt correction control

KEITHLEY DOUGLAS G

Tone dependent threshold perturbation error diffusion halftone

Mechanical galvanometer tilt correction control

Color adjustment for a scanned image

Oscillating mirror line based image transformation

Systems and methods for laser spacing compensation in laser printing devices

Color space conversion

Pixel stacking avoidance error diffusion halftone

Laser printer with reduced banding artifacts

Mechanical galvanometer tilt correction

Faster monochrome printing for in-line electrophotographic color printers

Laser printer with reduced banding artifacts

HEWLETT PACKARD CO

System and method for scanner calibration

Method and apparatus for converting a gray level pixel image to a binary level pixel image

Sensor assemblies for color optical image scanners optical scanner and methods of scanning color images

Imaging system with color corrected light source

Servo gain compensation in a disk drive

Conversion of error-diffused facsimile images to lower resolutions

HEWLETT PACKARD DEVELOPMENT CO

Method and system for modifying portions of an image bit stream representing printing horizontal lines and edges to improve print quality

Skew compensation for raster image transfer device

Image forming device fast draft print mode

System and method for scanning a document

Method and apparatus for reproducing sepia-tone images

System and method for scanning a document

MONTIERTH MARK D

Method and apparatus for storing data in a NAND flash memory

Semi-volatile NAND flash memory

Memory usage in imaging devices

Storing device drivers in imaging devices

MARVELL INT TECHNOLOGY LTD

Scanning apparatus and method for entering a user input into the apparatus using a non-electrical control device

Methods and systems for image scaling

Laser print apparatus that generates pulse width value and justification value based on pixels in a multi-bit image

Laser print apparatus that generates pulse width value and justification value based on pixels in a multi-bit image

SCHMIDT WILLIAM R

Non-sequential transfer of data from a memory

Non-sequential transfer of data from a memory

JENSEN NANETTE C

System and method for determining light source current

HALL JR JAMES A

User interface feedback using scanner light source

MOSS ROY G

Method and apparatus for fine edge control on integrated circuit outputs

REEVES GERALD J

Scanner calibration with dead pixel compensation

MARSHALL JOHN D

Pulse width modulator for a printing device

MCDOUGAL JAY

Configurable color trapping