LexDanaLexDanabeta
Inventor

Yutaka Ohtsu

Inventor
Yokohama, JP

Overview

22→
Patents
1985–2008
Patent span
Performing operations
Primary field (CPC B)

Patents· 22 as inventor

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

B01Jprimary
B01JChemical or physical processes, e.g. catalysis or colloid chemistry22%
Y10TTechnical subjects covered by former us classification14%
B01DSeparation9%
G01NInvestigating or analysing materials by determining their chemical or physical properties9%
C01BNon-metallic elements7%
A61KPreparations for medical, dental or toiletry purposes5%
A61QSpecific use of cosmetics or similar toiletry preparations5%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds5%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments5%
C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties5%
PatentTitleYear
7,329,386'Column packing material and method for producing the same'20086,482,867'Polymer packing material for liquid chromatography and a producing method thereof'20026,360,589'Liquid chromatography and column packing material'20026,316,647'Cation-exchanged clay mineral, packing material for chromatography using the same and method of producing the same'20016,063,283'Method for analyzing a sample by using a liquid chromatograph'20005,990,182'Polymer packing material for liquid chromatography and a producing method thereof'19995,738,783'Liquid chromatograph having a micro- and semi-micro column'19985,672,422'Packing material for column and process for production thereof'19975,318,848'Modified silica gel in chromatography packing material'19945,203,991'Packing material for liquid chromatography'19935,145,578'Packing material for liquid chromatography'19925,135,649'Column packing material with both hydrophobic and hydrophilic groups and process for production thereof'19924,882,225'Modified powder or particulate material'19894,818,614'Modified powder'19894,801,445'Cosmetic compositions containing modified powder or particulate material'1989D0297536'Pocket sized television'19884,743,377'Packing material for liquid chromatography'1988D0290010'Micro floppy disk drive'1987D0288321'Portable television set'1987D0285443'Portable television set'1986D0284473'Portable television set'1986D0281244'Portable television set'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–1988Patents assigned to CITIZEN WATCH CO LTD (6)· patent assignee history
1985–1987Based in Yokosuka, JP· patent location history
1986–1988Based in Kanagawa, JP· patent location history
1988–2008Patents assigned to SHISEIDO CO LTD (16)· patent assignee history
1988–2008Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SHISEIDO CO LTD161988–2008
CITIZEN WATCH CO LTD61985–1988
Locations
LocationPatentsSpan
Yokohama, JP161988–2008
Kanagawa, JP31986–1988
Yokosuka, JP31985–1987