LexDanaLexDanabeta
Inventor

Douglas Richards

Inventor
Crayford, GB

Overview

4→
Patents
1991–2020
Patent span
Performing operations
Primary field (CPC B)

Patents· 4 as inventor

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

B66Bprimary
B66BElevators40%
B65HHandling thin or filamentary material, e.g. sheets, webs, cables20%
H04LTransmission of digital information, e.g. telegraphic communication20%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests20%
PatentTitleYear
10,666,691Dynamic session classification20206,279,897'Sheet separator dam'20015,065,843'Method for installing elevator system components'19915,033,586'Construction elevator assembly'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991Patents assigned to OTIS ELEVATOR CO (2)· patent assignee history
1991Based in Crayford, GB· patent location history
2001Patents assigned to LEXMARK INT INC (1)· patent assignee history
2001Based in Gardner, KS, US· patent location history
2020Patents assigned to AVAYA INC (1)· patent assignee history
2020Based in Cranberra, AU· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
OTIS ELEVATOR CO21991
AVAYA INC12020
LEXMARK INT INC12001
Locations
LocationPatentsSpan
Crayford, GB21991
Cranberra, AU12020
Gardner, KS, US12001