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Inventor

Johnny O. Sim

Inventor
Alhambra, CA, US

Overview

3→
Patents
1995–2021
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.

C09Dprimary
C09DCoating compositions, e.g. paints, varnishes or lacquers50%
H01HElectric switches25%
H02HEmergency protective circuit arrangements25%
PatentTitleYear
11,049,677Inverse current injection-type direct current blocking device and method using vacuum gap switch20215,487,789'Paint stripper'19965,411,678'Paint stripper'1995

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1995–1996Patents assigned to ROHCO INC MCGEAN (2)· patent assignee history
1995–1996Based in Alhambra, CA, US· patent location history
2021Patents assigned to KOREA ELECTRO TECH RESEARCH INSTITUTE (1)· patent assignee history
2021Patents assigned to LSIS CO LTD (1)· patent assignee history
2021Based in Sejong-si, KR· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ROHCO INC MCGEAN21995–1996
KOREA ELECTRO TECH RESEARCH INSTITUTE12021
LSIS CO LTD12021
Locations
LocationPatentsSpan
Alhambra, California, US21995–1996
Sejong-si, KR12021