Inventor

Douglas B. Arnold

Inventor

Portland, GB

Overview

3→

Patents

1991–1994

Patent span

Performing operations

Primary field (CPC B)

Patents· 3 as inventor

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

B06Bprimary

B06BMethods or apparatus for generating or transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency, e.g. for performing mechanical work in general33%

G10KSound-producing devices33%

H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers22%

Y10TTechnical subjects covered by former us classification11%

PatentTitleYear

5,345,428'Flextensional transducers'1994 5,029,148'Sonar Transducers'1991 5,016,228'Sonar transducers'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1994Patents assigned to SECR DEFENCE BRIT (3)· patent assignee history

1991Based in Portland, GB· patent location history

1994Based in Dorset, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SECR DEFENCE BRIT	3	1991–1994

Locations

Location	Patents	Span
Portland, GB	2	1991
Dorset, GB	1	1994