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Inventor

Hiroshi Hirakawa

Inventor
Isehara, JP

Overview

15→
Patents
1977–1995
Patent span
General tagging of new technological developments
Primary field (CPC Y)

Patents· 15 as inventor

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

B60Cprimary
B60CVehicle tyres22%
Y02TClimate change mitigation technologies related to transportation14%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients12%
Y10TTechnical subjects covered by former us classification12%
C08LCompositions of macromolecular compounds10%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
C08JWorking-up6%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form4%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for2%
E01FAdditional work, such as equipping roads or the construction of platforms, helicopter landing stages, signs, snow fences, or the like2%
PatentTitleYear
5,405,690'Rubber-rubber bonded composite structure'19955,370,915'Rubber-rubber bonded composite structure'19945,264,259'Energy absorbing structure'19935,236,030'Pneumatic tire with inner liner of ultra high molecular weight polyethylene film and method of making the same'19934,748,168'Rubber compositions for tire treads'19884,396,052'Radial tire'19834,373,566'Pneumatic radial tire having a reduced rolling resistance'19834,349,061'Pneumatic radial tires for passenger cars having a low rolling resistance'19824,342,670'Process for preparing rubber compositions for tire treads'19824,323,485'Rubber compositions for tire treads having low rolling resistance'19824,321,168'Process for preparing rubber composition for tire treads'19824,309,318'Tread compositions for tires having low rolling resistance'19824,026,878'Vulcanization accelerator system for rubber compositions'19774,026,877'Vulcanization accelerator system for rubber compositions'19774,020,252'Vulcanization accelerator system for rubber compositions'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1995Patents assigned to YOKOHAMA RUBBER CO LTD (12)· patent assignee history
1977–1995Based in Isehara, JP· patent location history
1982–1983Patents assigned to BRIDGESTONE TIRE CO LTD (2)· patent assignee history
1982Patents assigned to NIPPON ZEON CO (1)· patent assignee history
1982–1983Based in Musashino, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
YOKOHAMA RUBBER CO LTD121977–1995
BRIDGESTONE TIRE CO LTD21982–1983
NIPPON ZEON CO11982
Locations
LocationPatentsSpan
Isehara, JP131977–1995
Musashino, JP21982–1983