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Inventor

Charles David Caldwell

Inventor
Cliffwood Beach, NJ, US

Overview

12→
Patents
1997–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 12 as inventor

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

H04Mprimary
H04MTelephonic communication36%
H04NPictorial communication, e.g. television27%
G10LSpeech analysis techniques or speech synthesis14%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes9%
B66CCranes5%
G06FElectric digital data processing5%
H04HBroadcast communication5%
PatentTitleYear
11,053,104Boom for a pipelaying machine20219,361,888'Method and device for providing speech-to-text encoding and telephony service'20168,489,397'Method and device for providing speech-to-text encoding and telephony service'20138,265,931'Method and device for providing speech-to-text encoding and telephony service'20128,019,686'Method and system for allowing simultaneous usage of prepaid services'20117,627,529'Method and system for allowing simultaneous usage of prepaid services'20097,433,818'Subscriber terminal for providing speech-text encoding and telephony service'20087,027,986'Method and device for providing speech-to-text encoding and telephony service'20066,687,349'System and method for defining a local communication space'20046,418,202'Spontaneous messaging service for prepaid calling card users'20026,021,432'System for processing broadcast stream comprises a human-perceptible broadcast program embedded with a plurality of human-imperceptible sets of information'20005,671,267'Interactive system for communications between a cordless telephone and a remotely operated device'1997

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1997–2000Patents assigned to LUCENT TECHNOLOGIES INC (2)· patent assignee history
1997–2013Based in Cliffwood Beach, NJ, US· patent location history
2002–2009Patents assigned to AT & T CORP (5)· patent assignee history
2008–2016Based in Keyport, NJ, US· patent location history
2009–2011Based in Asbury Park, NJ, US· patent location history
2011–2016Patents assigned to AT & T IP II LP (4)· patent assignee history
2012–2013Patents assigned to CALDWELL CHARLES DAVID (2)· patent assignee history
2012–2013Patents assigned to HARLOW JOHN BRUCE (2)· patent assignee history
2021Based in Metamora, IL, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AT & T CORP52002–2009
AT & T IP II LP42011–2016
CALDWELL CHARLES DAVIDself22012–2013
HARLOW JOHN BRUCE22012–2013
LUCENT TECHNOLOGIES INC21997–2000
Locations
LocationPatentsSpan
Cliffwood Beach, New Jersey, US71997–2013
Keyport, New Jersey, US22008–2016
Asbury Park, New Jersey, US22009–2011
Metamora, Illinois, US12021