Inventor
Kawakami Fukushi
Inventor
Hamamatsu, JP
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Hprimary
G01HMeasurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves33%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers33%
Y10TTechnical subjects covered by former us classification33%
PatentTitleYear
6,526,840'Method for measuring sound absorption power of a theater chair with a human being seated thereon and a dummy sound absorber'20036,463,817'Dummy sound absorber representing a seated human for measuring sound absorption power of a theater chair'20026,105,443'Dummy sound absorber representing a seated human for measuring sound absorption power of a theater chair'20005,465,469'Method for measuring sound absorption power of a theater chair with a dummy representing a human being seated thereon'1995Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1995–2003Patents assigned to YAMAHA CORP (4)· patent assignee history
1995–2003Based in Hamamatsu, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| YAMAHA CORP | 4 | 1995–2003 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hamamatsu, JP | 4 | 1995–2003 |