Inventor

Keiichi Kuniya

Inventor

Hitachi, JP

Overview

1976–1990

Patent span

Electricity

Primary field (CPC H)

Patents· 21 as inventor

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

H10Wprimary

H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1018%

H01HElectric switches13%

Y10TTechnical subjects covered by former us classification13%

B23KSoldering or unsoldering7%

C04BLime, magnesia7%

C22CAlloys7%

C22FChanging the physical structure of non-ferrous metals and non-ferrous alloys7%

B21BRolling of metal4%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%

B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form2%

PatentTitleYear

4,941,251'Rollers for rolling mills'1990 4,839,949'Rollers for rolling mills'1989 4,689,091'Process for producing zirconium-based alloy'1987 4,678,521'Process for producing zirconium-based alloy and the product thereof'1987 4,664,727'Zirconium alloy having superior corrosion resistance'1987 4,551,596'Surge-absorberless vacuum circuit interrupter'1985 4,547,639'Vacuum circuit breaker'1985 4,497,875'Ceramic substrate with metal plate'1985 4,482,912'Stacked structure having matrix-fibered composite layers and a metal layer'1984 4,478,363'Method of production of composite billet for fuel cladding tube'1984 4,470,063'Copper matrix electrode having carbon fibers therein'1984 4,347,413'Electrodes of vacuum circuit breaker'1982 4,254,548'Method of fabricating electrode plate for supporting semiconductor device'1981 4,253,038'Light source excited by high frequency for Zeeman effect atomic absorption analysis'1981 4,231,814'Method of producing a vacuum circuit breaker'1980 4,229,631'Vacuum-type circuit breaker'1980 4,226,917'Composite joint system including composite structure of carbon fibers embedded in copper matrix'1980 4,196,442'Semiconductor device'1980 4,091,248'Vacuum-type circuit breaker'1978 4,083,719'Copper-carbon fiber composites and process for preparation thereof'1978 3,969,754'Semiconductor device having supporting electrode composite structure of metal containing fibers'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1990Patents assigned to HITACHI LTD (21)· patent assignee history

1976–1990Based in Hitachi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	21	1976–1990

Locations

Location	Patents	Span
Hitachi, JP	21	1976–1990