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Inventor

Andreas Weirich

Inventor
Ottawa, CA

Overview

7→
Patents
1985–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 7 as inventor

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

H04Mprimary
H04MTelephonic communication27%
H04BTransmission18%
G02BOptical elements, systems or apparatus9%
G06TImage data processing or generation, in general9%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light9%
H03MCoding9%
H04LTransmission of digital information, e.g. telegraphic communication9%
H04QSelecting9%
PatentTitleYear
10,873,173Reducing back reflection in hybrid lasers20207,010,026'Enhanced line card and packetizing CPE for lifeline packet voice telephone'20066,873,623'System and method for overlaying DSL access multiplexer onto existing access systems'20056,295,343'Method and apparatus for combining voice line card and xDSL line card functions'20014,592,070'ADPCM encoder/decoder with improved tracking'19864,549,304'ADPCM Encoder/decoder with signalling bit insertion'19854,542,516'ADPCM Encoder/decoder with zero code suppression'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–1986Patents assigned to NORTHERN TELECOM LTD (3)· patent assignee history
1985–2020Based in Ottawa, CA· patent location history
2001Patents assigned to CATENA NETWORKS INC (1)· patent assignee history
2001–2006Based in Stittsville, CA· patent location history
2005–2006Patents assigned to CIENA CORP (2)· patent assignee history
2020Patents assigned to ELENION TECH LLC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NORTHERN TELECOM LTD31985–1986
CIENA CORP22005–2006
CATENA NETWORKS INC12001
ELENION TECH LLC12020
Locations
LocationPatentsSpan
Ottawa, CA41985–2020
Stittsville, CA32001–2006