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Inventor

Dale Van Spengen

Inventor
Smith Falls, CA

Overview

3→
Patents
2002–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 3 as inventor

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

H02Pprimary
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters50%
A47KSanitary equipment25%
E03CDomestic plumbing installations for fresh water or waste water25%
PatentTitleYear
10,542,846Flow drain for bathing apparatus20208,339,090'Current control apparatus operable in wet environment'20126,346,790'Induction motor system with an induction motor and an electrically isolated voltage modulation motor controller'2002

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2002–2012Patents assigned to SEQUENCE CONTROLS INC (2)· patent assignee history
2002Patents assigned to EMERSON ELECTRIC CO (1)· patent assignee history
2002–2020Based in Smith Falls, CA· patent location history
2012Patents assigned to VAN SPENGEN DALE A (1)· patent assignee history
2012Based in Smiths Falls, CA· patent location history
2020Patents assigned to NUWHIRL SYSTEMS CORP (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SEQUENCE CONTROLS INC22002–2012
EMERSON ELECTRIC CO12002
NUWHIRL SYSTEMS CORP12020
VAN SPENGEN DALE Aself12012
Locations
LocationPatentsSpan
Smith Falls, CA22002–2020
Smiths Falls, CA12012