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Inventor

Rufus W. Warren

Inventor
Oak Lawn, IL, US

Overview

4→
Patents
1990–2021
Patent span
General tagging of new technological developments
Primary field (CPC Y)

Patents· 4 as inventor

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

H05Bprimary
H05BElectric heating25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
G05FSystems for regulating electric or magnetic variables17%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications17%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems8%
LOC158%
PatentTitleYear
D0911642Housing for a filter20215,600,233'Electronic power control circuit'19975,268,631'Power control system with improved phase control'19934,949,020'Lighting control system'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990Patents assigned to GORMAN JOHN E (1)· patent assignee history
1990Patents assigned to WARREN RUFUS W (1)· patent assignee history
1990–1997Based in Oak Lawn, IL, US· patent location history
1993–1997Patents assigned to CHICAGO STAGE EQUIPMENT CO (2)· patent assignee history
2021Patents assigned to TECHTRONIC FLOOR CARE TECH LTD (1)· patent assignee history
2021Patents assigned to TTI MACAO COMMERCIAL OFFSHORE LTD (1)· patent assignee history
2021Based in Charlotte, NC, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CHICAGO STAGE EQUIPMENT CO21993–1997
GORMAN JOHN E11990
TECHTRONIC FLOOR CARE TECH LTD12021
TTI MACAO COMMERCIAL OFFSHORE LTD12021
WARREN RUFUS Wself11990
Locations
LocationPatentsSpan
Oak Lawn, Illinois, US31990–1997
Charlotte, NC, US12021