Inventor

David V. Roberts

Inventor

Bristol, GB

Overview

1979–2017

Patent span

Performing operations

Primary field (CPC B)

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

B21Jprimary

B21JForging14%

B29CShaping or joining of plastics14%

B29DProducing particular articles from plastics or from substances in a plastic state14%

B29LIndexing scheme associated with subclass b29c, relating to particular articles14%

F01DNon-positive displacement machines or engines, e.g. steam turbines14%

F05DIndexing scheme for aspects relating to non-positive-displacement machines or engines, gas-turbines or jet-propulsion plants14%

Y02TClimate change mitigation technologies related to transportation14%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1979Patents assigned to JOY MANUFACTURING (1)· patent assignee history

1979Based in Waterloo, CA· patent location history

2017Patents assigned to ROLLS ROYCE PLC (1)· patent assignee history

2017Based in Bristol, GB· patent location history

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
JOY MANUFACTURING	1	1979
ROLLS ROYCE PLC	1	2017

Locations

Location	Patents	Span
Bristol, GB	1	2017
Waterloo, CA	1	1979