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Inventor

Chu-Cheng Chang

Inventor
Hsinchu, TW

Overview

5→
Patents
1980–2011
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 5 as inventor

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

F21Sprimary
F21SNon-portable lighting devices20%
H05BElectric heating20%
F21VFunctional features or details of lighting devices or systems thereof10%
F21YIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to the form or the kind of the light sources or of the colour of the light emitted10%
G01RMeasuring electric variables10%
H01RElectrically-conductive connections10%
LOC2610%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%
PatentTitleYear
8,053,995'LED light string without additional resistors'20118,044,599'Light string with alternate LED lamps and incandescent lamps'20117,597,454'Christmas light string with socket for connecting to another christmas light string'2009D0459009'String lamp'20024,227,096'Microwave integrated circuit for Josephson voltage standards'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980Patents assigned to CHANG CHU CHENG (1)· patent assignee history
1980Based in Kowloon Tong, HK· patent location history
2002–2011Based in Hsinchu, TW· patent location history
2009–2011Patents assigned to CHANG CHEN-HSIEN (3)· patent assignee history
2009–2011Patents assigned to CHANG CHEN-TAO (3)· patent assignee history
2009–2011Patents assigned to CHANG CHENG-FEN (3)· patent assignee history
2009–2011Patents assigned to CHANG CHU-CHENG (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CHANG CHEN-HSIEN32009–2011
CHANG CHEN-TAO32009–2011
CHANG CHENG-FEN32009–2011
CHANG CHU-CHENGself32009–2011
CHANG CHU CHENGself11980
Locations
LocationPatentsSpan
Hsinchu, TW42002–2011
Kowloon Tong, HK11980