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Inventor

Kazuhiro Yokoyama

Inventor
Tokyo, JP

Overview

15→
Patents
1982–2015
Patent span
Performing operations
Primary field (CPC B)

Patents· 15 as inventor

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

H01Hprimary
H01HElectric switches19%
G06FElectric digital data processing15%
B03BSeparating solid materials using liquids or using pneumatic tables or jigs7%
B07BSeparating solids from solids by sieving, screening, sifting or by using gas currents7%
B41FPrinting machines or presses7%
B41NPrinting plates or foils7%
C23CCoating metallic material7%
H04LTransmission of digital information, e.g. telegraphic communication7%
B22CFoundry moulding4%
B41JTypewriters4%
PatentTitleYear
9,147,962'Connector'20157,793,704'Method of installing sand core for casting in mold and sand core for casting'20107,094,984'Key switch and keyboard input device using the same'20066,956,951'Extended key preparing apparatus, extended key preparing method, recording medium and computer program'20056,901,859'Washing device and its method for impression cylinder jacket in sheet-fed offset two-sided printing press'20056,330,332'Prime number generation apparatus B-smoothness judgement apparatus and computer memory product'20016,284,988'Keyboard apparatus the operation side of which can be illuminated'20016,225,586'Thin keyboard apparatus'20016,087,604'Thin keyboard'20006,077,207'Printing web transporting roller'20005,453,755'Circularly-polarized-wave flat antenna'19954,991,501'Dampening water feed roller for planographic printing press'19914,771,146'Keyboard key top mounting structure'19884,391,702'Method for classification of coals for coke production'19834,310,412'Method for classification of coals for coke production'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982–1991Patents assigned to NIPPON STEEL CORP (3)· patent assignee history
1982–1983Based in Himeji, JP· patent location history
1988–2006Patents assigned to ALPS ELECTRIC CO LTD (5)· patent assignee history
1991Patents assigned to AKYAMA INSATSUKI SEIZO KK (1)· patent assignee history
1991–2010Based in Tokyo, JP· patent location history
2000–2001Based in Fukushima, JP· patent location history
2001–2005Patents assigned to FUJITSU LTD (2)· patent assignee history
2001–2005Based in Kawasaki, JP· patent location history
2015Patents assigned to ASADA JUN (1)· patent assignee history
2015Based in Toyota, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ALPS ELECTRIC CO LTD51988–2006
NIPPON STEEL CORP31982–1991
FUJITSU LTD22001–2005
AKYAMA INSATSUKI SEIZO KK11991
ASADA JUN12015
Locations
LocationPatentsSpan
Tokyo, JP31991–2010
Fukushima, JP32000–2001
Kawasaki, JP22001–2005
Himeji, JP21982–1983
Toyota, JP12015