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Inventor

William N. Johnson

Inventor
Guernsey, GB

Overview

3→
Patents
1985–1998
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 as inventor

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

B42Fprimary
B42FSheets temporarily attached together17%
C01GCompounds containing metals not covered by subclasses c01d or c01f17%
C22BProduction and refining of metals17%
G06FElectric digital data processing17%
G11CStatic stores17%
Y02PClimate change mitigation technologies in the production or processing of goods17%
PatentTitleYear
5,844,797'Photographic albums'19984,982,360'Memory subsystem'19914,508,701'Extraction of tungsten from spent or scrap catalyst materials'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985Patents assigned to UNION CARBIDE CORP (1)· patent assignee history
1985Based in Ridgefield, CT, US· patent location history
1991Patents assigned to DIGITAL EQUIPMENT CORP (1)· patent assignee history
1991Based in Sudbury, MA, US· patent location history
1998Patents assigned to DURAND LTD (1)· patent assignee history
1998Based in Guernsey, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DIGITAL EQUIPMENT CORP11991
DURAND LTD11998
UNION CARBIDE CORP11985
Locations
LocationPatentsSpan
Guernsey, GB11998
Sudbury, Massachusetts, US11991
Ridgefield, CT, US11985