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Inventor

Yoshimasa Fujii

Inventor
Moka, JP

Overview

10→
Patents
1984–2019
Patent span
Performing operations
Primary field (CPC B)

Patents· 10 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus21%
B22DCasting of metals16%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests16%
B22CFoundry moulding11%
A23BPreservation of foods, foodstuffs or non-alcoholic beverages5%
A23LFoods, foodstuffs or non-alcoholic beverages, not otherwise provided for5%
A23VIndexing scheme relating to foods, foodstuffs or non-alcoholic beverages and lactic or propionic acid bacteria used in foodstuffs or food preparation5%
B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers5%
F24CDomestic stoves or ranges5%
G01DMeasuring not specially adapted for a specific variable5%
PatentTitleYear
10,471,498Production method of castings and gas-permeable casting mold201910,232,431Production method of castings and gas-permeable casting mold20199,592,550'Method for producing castings'20174,803,088'Container packed with instant food for use in microwave oven'19894,753,497'Directional coupler for coupling single-polarization optical fibers'19884,684,208'Optical branching element'19874,622,663'Optical wavelength demultiplexer'19864,603,941'Polarization-maintaining fiber system and method of manufacturing the same'19864,483,879'Method of preparing dried noodles'19844,474,427'Optical fiber reflective filter'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–1989Patents assigned to HOUSE FOOD INDUSTRIAL CO (2)· patent assignee history
1984Patents assigned to CANADIAN PATENTS DEV (1)· patent assignee history
1984Based in Yamatokooiriyama, JP· patent location history
1986–1988Patents assigned to AGENCY IND SCIENCE TECHN (2)· patent assignee history
1986–1987Patents assigned to SUMITOMO METAL MINING CO (2)· patent assignee history
1986–1988Based in Tokyo, JP· patent location history
1987Based in Funabashi, JP· patent location history
1989Based in Yamatokouriyama, JP· patent location history
2017–2019Patents assigned to HITACHI METALS LTD (3)· patent assignee history
2017–2019Based in Moka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI METALS LTD32017–2019
AGENCY IND SCIENCE TECHN21986–1988
HOUSE FOOD INDUSTRIAL CO21984–1989
SUMITOMO METAL MINING CO21986–1987
CANADIAN PATENTS DEV11984
Locations
LocationPatentsSpan
Moka, JP32017–2019
Tokyo, JP31986–1988
Yamatokouriyama, JP11989
Funabashi, JP11987
Yamatokooiriyama, JP11984