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Inventor

Martin Sessler

Inventor
Darmstadt, DE

Overview

2→
Patents
1987–1988
Patent span
Electricity
Primary field (CPC H)

Patents· 2 as inventor

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

H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers100%
PatentTitleYear
4,742,548'Unidirectional second order gradient microphone'19884,675,906'Second order toroidal microphone'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987Patents assigned to AT & T COMPANY AT & T BELL LAB (1)· patent assignee history
1987–1988Based in Darmstadt, DE· patent location history
1988Patents assigned to AMERICAN TELEPHONE & TELEGRAPH (1)· patent assignee history
1988Patents assigned to BELL TELEPHONE LABOR INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AMERICAN TELEPHONE & TELEGRAPH11988
AT & T COMPANY AT & T BELL LAB11987
BELL TELEPHONE LABOR INC11988
Locations
LocationPatentsSpan
Darmstadt, DE21987–1988