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Inventor

Robert A. Scragg

Inventor
Vancouver, CA

Overview

2→
Patents
1999–2000
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

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

B61Lprimary
B61LGuiding railway traffic25%
G01SRadio direction-finding25%
H04BTransmission25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
PatentTitleYear
6,133,849'Control signal coding and detection in the audible and inaudible ranges'20005,910,929'Audio railway crossing detector'1999

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999Patents assigned to SONIC SYSTEMS CORP (1)· patent assignee history
1999–2000Based in Vancouver, CA· patent location history
2000Patents assigned to UNITY WIRELESS SYSTEMS CORP (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SONIC SYSTEMS CORP11999
UNITY WIRELESS SYSTEMS CORP12000
Locations
LocationPatentsSpan
Vancouver, CA21999–2000