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Inventor

William H. Henrich

Inventor
Sparta, TN, US

Overview

3→
Patents
1983–1989
Patent span
General tagging of new technological developments
Primary field (CPC Y)

Patents· 3 as inventor

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

H05Bprimary
H05BElectric heating43%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests43%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications14%
PatentTitleYear
4,873,471'High frequency ballast for gaseous discharge lamps'19894,791,338'Fluorescent lamp circuit with regulation responsive to voltage, current, and phase of load'19884,414,493'Light dimmer for solid state ballast'1983

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983–1989Patents assigned to THOMAS INDUSTRIES INC (3)· patent assignee history
1983–1989Based in Sparta, TN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
THOMAS INDUSTRIES INC31983–1989
Locations
LocationPatentsSpan
Sparta, TN, US31983–1989