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Inventor

Clifford M. Spencer

Inventor
Lexington, MA, US

Overview

8→
Patents
1993–2013
Patent span
Electricity
Primary field (CPC H)

Patents· 8 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Qprimary
H04QSelecting36%
H04LTransmission of digital information, e.g. telegraphic communication32%
H04MTelephonic communication32%
PatentTitleYear
8,451,716'System and method for assisting in controlling real-time transport protocol flow through multiple networks'20138,204,064'Method and system of session media negotiation'20127,620,053'System and method for assisting in controlling real-time transport protocol flow through multiple networks'20097,133,923'System and method for assisting in controlling real-time transport protocol flow through multiple networks via screening'20067,072,303'System and method for assisting in controlling real-time transport protocol flow through multiple networks'20067,028,092'System and method for assisting in controlling real-time transport protocol flow through multiple networks via media flow routing'20067,002,973'System and method for assisting in controlling real-time transport protocol flow through multiple networks via use of a cluster of session routers'20065,260,990'Multiple integrations unit for coupling different switching systems to a message storage system'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993Patents assigned to BOSTON TECH INC (1)· patent assignee history
1993Based in Arlington, MA, US· patent location history
2006–2013Patents assigned to ACME PACKET INC (7)· patent assignee history
2006–2013Based in Lexington, MA, US· patent location history
2012–2013Patents assigned to PENFIELD ROBERT F (2)· patent assignee history
2013Patents assigned to ARENS CYNTHIA E (1)· patent assignee history
2013Patents assigned to COMMERFORD PETER S (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ACME PACKET INC72006–2013
PENFIELD ROBERT F22012–2013
ARENS CYNTHIA E12013
BOSTON TECH INC11993
COMMERFORD PETER S12013
Locations
LocationPatentsSpan
Lexington, Massachusetts, US72006–2013
Arlington, Massachusetts, US11993