Inventor
Masao Sunagawa
Inventor
Hitachi, JP
Overview
Patents· 15 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A47Lprimary
A47LDomestic washing or cleaning92%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
PatentTitleYear
6,282,749'Vacuum cleaner and suction nozzle body thereof cross reference to related application'20016,212,732'Vacuum cleaner and suction nozzle body therefor'20015,365,633'Vacuum cleaner'19945,216,778'Vacuum cleaner'19935,159,738'Vacuum cleaner having silencer mechanism'19925,131,114'Vacuum cleaner'19925,003,663'Upright-type electric vacuum cleaner'1991D0312901'Electric vacuum cleaner'19904,955,105'Vacuum cleaner'19904,905,341'Upright-type electric vacuum cleaner'19904,893,376'Upright-type electric vacuum cleaner'1990D0302878'Electric vacuum cleaner'19894,809,394'Vacuum cleaner having a blower facility structure'1989D0293728'Vacuum cleaner'19884,446,594'Upright type electric cleaner'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984–2001Patents assigned to HITACHI LTD (15)· patent assignee history
1984–1993Based in Hitachi, JP· patent location history
1992–2001Based in Mito, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 15 | 1984–2001 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachi, JP | 11 | 1984–1993 |
| Mito, JP | 4 | 1992–2001 |