Inventor

TESTARDI STEPHEN L

US6 patents

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

HEWLETT PACKARD DEVELOPMENT CO

3 patents

US6607267B2Aug 19, 2003

Method of printing a security verification with inkjet printers

HEWLETT PACKARD DEVELOPMENT CO78 citations95

US7293292B2Nov 6, 2007

Method and system for securely and selectively providing optional features or premium functionality in a printer

HEWLETT PACKARD DEVELOPMENT CO8 citations68

US8027048B2Sep 27, 2011

Method and article for determining use of consumable items in an image-forming device

HEWLETT PACKARD DEVELOPMENT CO3 citations59

HEWLETT PACKARD CO

1 patent

US5865121AFeb 2, 1999

System for cleaning rollers in an image forming device

HEWLETT PACKARD CO36 citations90

TESTARDI STEPHEN L

1 patent

US10295946B2May 21, 2019

Warranty entitlement of image-forming device consumable item

TESTARDI STEPHEN L3 citations64

SIMPSON SHELL S

1 patent

US8662622B2Mar 4, 2014

Print cartridge output sample

SIMPSON SHELL S0 citations50