Inventor

Shigeyoshi Nagata

Inventor

Tokyo, JP

Overview

8→

Patents

1980–2006

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 8 as inventor

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

Y10Tprimary

Y10TTechnical subjects covered by former us classification28%

B23FMaking gears or toothed racks11%

F01CRotary-piston or oscillating-piston machines or engines11%

F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids11%

F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g11%

F16HGearing11%

G01FMeasuring volume, volume flow, mass flow or liquid level11%

F16GBelts, cables, or ropes, predominantly used for driving purposes6%

PatentTitleYear

7,048,666'Silent chain power transmitting apparatus'2006 5,800,151'Screw rotor and method of generating tooth profile therefor'1998 5,697,772'Screw rotor and method of generating tooth profile therefor'1997 5,205,679'Rotary tool for generating bevel gears'1993 4,971,487'Method for cutting involute gears'1990 4,899,609'Gears having a tooth-profile with a smaller relative of curvature at a contact point'1990 4,329,130'Flow meter with helical toothed rotors having no pulsation and zero contact pressure'1982 4,224,015'Positive displacement flow meter with helical-toothed rotors'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1982Patents assigned to OVAL ENG CO LTD (2)· patent assignee history

1980–2006Based in Tokyo, JP· patent location history

1990Patents assigned to KYOUIKO GEAR MFG (1)· patent assignee history

1993Patents assigned to KYOIKU HAGUROMA KOGYO KABUSHIK (1)· patent assignee history

1997–1998Patents assigned to EBARA CORP (2)· patent assignee history

2006Patents assigned to HITACHI POWDERED METALS (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
EBARA CORP	2	1997–1998
OVAL ENG CO LTD	2	1980–1982
HITACHI POWDERED METALS	1	2006
KYOIKU HAGUROMA KOGYO KABUSHIK	1	1993
KYOUIKO GEAR MFG	1	1990

Locations

Location	Patents	Span
Tokyo, JP	8	1980–2006