Inventor
Toshiaki Koizumi
Inventor
Hitachinaka, JP
Overview
Patents· 20 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B25Fprimary
B25FCombination or multi-purpose tools not otherwise provided for18%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters15%
H02KDynamo-electric machines13%
G11BInformation storage based on relative movement between record carrier and transducer7%
B25BTools or bench devices not otherwise provided for, for fastening, connecting, disengaging, or holding5%
B23DPlaning4%
B23KSoldering or unsoldering4%
H02JElectric power networks4%
H05KPrinted circuits4%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h104%
PatentTitleYear
11,123,846Electric tool202111,070,160Electric power tool202110,744,633Power Tool202010,717,138Power tool202010,536,056Electric power tool202010,505,473Electric tool201910,307,841Power tool201910,205,198Power tool and battery pack201910,033,323Electric power tool20189,793,847'Electric power tool'20179,769,990'Power tool'20179,768,713'Electric tool'20179,457,459'Power tool provided with circuit board'20167,476,977'Semiconductor chip mounting substrate, a method of producing the same, and a method of mounting a semiconductor chip'20097,452,798'Semiconductor chip mounting substrate, a method of producing the same, and a method of mounting a semiconductor chip'20085,477,154'An EDP checker including a matching circuit'19955,084,854'Optical disk reproducing apparatus'19924,949,328'Disk player for playing both sides of a disk or multiple disks without ejection thereof and a disk player with a disk being played that overlaps disks stored in a storage receptor'19904,845,700'Front loading disc player'19894,695,995'Front loading disk player with improved disk sensor positioning'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–1992Patents assigned to PIONEER ELECTRONIC CORP (4)· patent assignee history
1987–1992Based in Saitama, JP· patent location history
1995–2021Patents assigned to HITACHI KOKI KK (12)· patent assignee history
1995Based in Katsuta, JP· patent location history
2008–2009Patents assigned to HITACHI LTD (2)· patent assignee history
2008–2009Based in Tokyo, JP· patent location history
2016–2018Patents assigned to KOIZUMI TOSHIAKI (2)· patent assignee history
2016–2021Based in Ibaraki, JP· patent location history
2017–2021Based in Hitachinaka, JP· patent location history
2019–2021Patents assigned to KOKI HOLDINGS CO LTD (8)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI KOKI KK | 12 | 1995–2021 |
| KOKI HOLDINGS CO LTD | 8 | 2019–2021 |
| PIONEER ELECTRONIC CORP | 4 | 1987–1992 |
| HITACHI LTD | 2 | 2008–2009 |
| KOIZUMI TOSHIAKIself | 2 | 2016–2018 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachinaka, JP | 9 | 2017–2021 |
| Ibaraki, JP | 4 | 2016–2021 |
| Saitama, JP | 3 | 1987–1992 |
| Tokyo, JP | 2 | 2008–2009 |
| Katsuta, JP | 1 | 1995 |