Inventor

John J. Croat

Inventor

Sterling Heights, MI, US

Overview

1978–1994

Patent span

Electricity

Primary field (CPC H)

Patents· 14 as inventor

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

H01Fprimary

H01FMagnets57%

C22CAlloys30%

B22FWorking metallic powder9%

H02KDynamo-electric machines4%

PatentTitleYear

5,352,301'Hot pressed magnets formed from anisotropic powders'1994 5,314,548'Fine grained anisotropic powder from melt-spun ribbons'1994 5,174,362'High-energy product rare earth-iron magnet alloys'1992 5,172,751'High energy product rare earth-iron magnet alloys'1992 5,056,585'High energy product rare earth-iron magnet alloys'1991 4,902,361'Bonded rare earth-iron magnets'1990 4,881,985'Method for producing anisotropic RE-FE-B type magnetically aligned material'1989 4,851,058'High energy product rare earth-iron magnet alloys'1989 4,802,931'High energy product rare earth-iron magnet alloys'1989 4,756,775'High energy product rare earth-iron magnet alloys'1988 4,496,395'High coercivity rare earth-iron magnets'1985 4,347,086'Selective magnetization of rare-earth transition metal alloys'1982 4,312,684'Selective magnetization of manganese-aluminum alloys'1982 4,076,561'Method of making a laminated rare earth metal-cobalt permanent magnet body'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1994Patents assigned to GEN MOTORS CORP (13)· patent assignee history

1978–1992Based in Sterling Heights, MI, US· patent location history

1982Based in Sterling Hts., MI, US· patent location history

1989–1994Based in Noblesville, IN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
GEN MOTORS CORP	13	1978–1994

Locations

Location	Patents	Span
Sterling Heights, MI, US	10	1978–1992
Noblesville, IN, US	3	1989–1994
Sterling Hts., MI, US	1	1982