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Inventor

Robert B. Graybill

Inventor
Woodstock, MD, US

Overview

6→
Patents
1993–2011
Patent span
Electricity
Primary field (CPC H)

Patents· 6 as inventor

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

H04Hprimary
H04HBroadcast communication42%
H04KSecret communication25%
H04LTransmission of digital information, e.g. telegraphic communication25%
G06FElectric digital data processing8%
PatentTitleYear
7,961,881'Apparatus and methods for including codes in audio signals'20116,996,237'Apparatus and methods for including codes in audio signals'20066,421,445'Apparatus and methods for including codes in audio signals'20025,764,763'Apparatus and methods for including codes in audio signals and decoding'19985,450,490'Apparatus and methods for including codes in audio signals and decoding'19955,179,714'Parallel bit serial data processor'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993Patents assigned to MARTIN MARIETTA CORP (1)· patent assignee history
1993–1995Based in Ellicott City, MD, US· patent location history
1995Patents assigned to ARBITRON CO (1)· patent assignee history
1998–2011Based in Woodstock, MD, US· patent location history
2002–2011Patents assigned to ARBITRON INC (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ARBITRON INC32002–2011
ARBITRON CO11995
MARTIN MARIETTA CORP11993
Locations
LocationPatentsSpan
Woodstock, Maryland, US41998–2011
Ellicott City, Maryland, US21993–1995