P

Inventor

DONZIS HENRY M

US56 patents
⚠️ This page may combine multiple inventors who share the name “DONZIS HENRY M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

PERFTECH INC

40 patents
US7328266B2Feb 5, 2008

Internet provider subscriber communications system

PERFTECH INC31 citations96
US11336586B2May 17, 2022

Internet provider subscriber communications system

PERFTECH INC3 citations84
US10834157B2Nov 10, 2020

Internet provider subscriber communications system

PERFTECH INC4 citations84
US10616131B2Apr 7, 2020

Internet provider subscriber communications system

PERFTECH INC4 citations84
US10601841B2Mar 24, 2020

System, method and computer readable medium for determining users of an internet service

PERFTECH INC2 citations84
US10225210B2Mar 5, 2019

Internet provider subscriber communications system

PERFTECH INC7 citations84
US9307041B2Apr 5, 2016

Internet connection user communications system

PERFTECH INC7 citations84
US12438889B2Oct 7, 2025

System, method and computer readable medium for message authentication to subscribers of an internet service provider

PERFTECH INC0 citations73
US12192213B2Jan 7, 2025

System, method and computer readable medium for processing unsolicited electronic mail

PERFTECH INC0 citations73
US11956251B2Apr 9, 2024

System, method and computer readable medium for determining users of an internet service

PERFTECH INC0 citations73
US11743205B2Aug 29, 2023

Internet provider subscriber communications system

PERFTECH INC2 citations73
US11736543B2Aug 22, 2023

Internet provider subscriber communications system

PERFTECH INC1 citations73
US11563750B2Jan 24, 2023

System, method and computer readable medium for determining users of an internet service

PERFTECH INC0 citations73
US11552961B2Jan 10, 2023

System, method and computer readable medium for processing unsolicited electronic mail

PERFTECH INC0 citations73
US11509665B2Nov 22, 2022

System, method and computer readable medium for message authentication to subscribers of an internet service provider

PERFTECH INC0 citations73
US10992686B2Apr 27, 2021

System, method and computer readable medium for determining users of an internet service

PERFTECH INC0 citations73
US10986102B2Apr 20, 2021

System, method and computer readable medium for processing unsolicited electronic mail

PERFTECH INC0 citations73
US10979484B2Apr 13, 2021

Method and system for providing watermark to subscribers

PERFTECH INC2 citations73
US10904265B2Jan 26, 2021

System, method and computer readable medium for message authentication to subscribers of an internet service provider

PERFTECH INC0 citations73
US10257242B2Apr 9, 2019

Internet provider subscriber communications system

PERFTECH INC1 citations73
US10554671B2Feb 4, 2020

System, method and computer readable medium for processing unsolicited electronic mail

PERFTECH INC0 citations63
US10348738B2Jul 9, 2019

System, method and computer readable medium for message authentication to subscribers of an internet service provider

PERFTECH INC0 citations63
US10069846B2Sep 4, 2018

System, method and computer readable medium for processing unsolicited electronic mail

PERFTECH INC0 citations63
US9838402B2Dec 5, 2017

System, method and computer readable medium for determining users of an internet service

PERFTECH INC0 citations63
US9742786B2Aug 22, 2017

System, method and computer readable medium for processing unsolicited electronic mail

PERFTECH INC0 citations63
US9325760B2Apr 26, 2016

Internet provider subscriber communications system

PERFTECH INC1 citations63
US9300613B2Mar 29, 2016

System, method and computer readable medium for processing unsolicited electronic mail

PERFTECH INC0 citations63
US9231961B2Jan 5, 2016

System, method and computer readable medium for message authentication to subscribers of an internet service provider

PERFTECH INC0 citations63
US8996640B2Mar 31, 2015

System, method and computer readable medium for processing unsolicited electronic mail

PERFTECH INC0 citations63
US12531936B2Jan 20, 2026

System and method for providing redirections

PERFTECH INC0 citations62
US12177287B2Dec 24, 2024

Method and system for providing watermark to subscribers

PERFTECH INC0 citations62
US12075131B2Aug 27, 2024

System and method for set-top-box messaging display

PERFTECH INC0 citations62
US11997180B2May 28, 2024

System and method for providing redirections

PERFTECH INC0 citations62
US11711417B2Jul 25, 2023

Method and system for providing watermark to subscribers

PERFTECH INC0 citations62
US11601726B2Mar 7, 2023

System and method for set-top-box messaging display

PERFTECH INC0 citations62
US11405478B2Aug 2, 2022

System and method for providing redirections

PERFTECH INC0 citations62
US11277671B2Mar 15, 2022

System and method for set-top-box messaging display

PERFTECH INC0 citations62
US10986417B2Apr 20, 2021

System and method for set-top-box messaging display

PERFTECH INC0 citations62
US10631062B2Apr 21, 2020

System and method for set-top-box messaging display

PERFTECH INC0 citations52
US10616360B2Apr 7, 2020

System and method for providing redirections

PERFTECH INC0 citations52

SCHMIDT JONATHAN E

5 patents

DONZIS HENRY M

3 patents

TOMPKINS E NEAL

1 patent

DONZIS LEWIS T

1 patent

Showing the top 50 of 56 patents by PatentIndex Score.