Inventor

Tetsuji Nakazawa

Inventor

Kanagawa, JP

Overview

7→

Patents

1982–2003

Patent span

Physics

Primary field (CPC G)

Patents· 7 as inventor

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

G11Bprimary

G11BInformation storage based on relative movement between record carrier and transducer55%

H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses18%

B23KSoldering or unsoldering9%

E05YIndexing scheme associated with subclasses e05d and e05f, relating to construction elements, electric control, power supply, power signal or transmission, user interfaces, mounting or coupling, details, accessories, auxiliary operations not otherwise provided for, application thereof9%

H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers9%

PatentTitleYear

6,666,371'Sealing system for electronic device and sealing method therefor'2003 6,256,274'Data erasure preventing method and circuit thereof and optical disc apparatus mounting the same'2001 6,185,172'Rotation control apparatus, reproduction apparatus to which rotation control apparatus is applied, and rotation control method'2001 6,150,888'Phase locked loop circuit, reproduction apparatus and phase locking method'2000 5,939,948'Phase locked loop circuit and reproducing apparatus'1999 4,395,739'Recording/reproducing apparatus with selective attenuation of reproduced signals to facilitate comprehension of external speech signals'1983 4,360,846'Operating mode change-over apparatus in tape recording and/or reproducing apparatus'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982–2001Patents assigned to SONY CORP (6)· patent assignee history

1982–1983Based in Tokyo, JP· patent location history

1999–2001Based in Kanagawa, JP· patent location history

2003Patents assigned to FUJITSU MEDIA DEVICES LTD (1)· patent assignee history

2003Based in Nagano, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SONY CORP	6	1982–2001
FUJITSU MEDIA DEVICES LTD	1	2003

Locations

Location	Patents	Span
Kanagawa, JP	4	1999–2001
Tokyo, JP	2	1982–1983
Nagano, JP	1	2003