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Inventor

Hirokazu Miyagawa

Inventor
Takasaki, JP

Overview

7→
Patents
1988–2008
Patent span
Electricity
Primary field (CPC H)

Patents· 7 as inventor

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

H03Lprimary
H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses29%
H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner21%
H04BTransmission21%
H03CModulation14%
B23KSoldering or unsoldering7%
E02DFoundations7%
PatentTitleYear
7,450,921'Communication semiconductor integrated circuit device for use in a mobile communication device for correcting variations in the oscillation frequency of a transmission oscillator by calibrating a current of the charge pump'20087,187,911'Calibrated PLL for wide band communication semiconductor integrated polar loop transmitter'20077,012,470'Communication semiconductor integrated circuit with frequency adjustment/control circuit'20066,731,101'Modulation semiconductor integrated circuit device and testing method for oscillation circuit'20046,677,788'Semiconductor integrated circuit'20045,948,292'Laser beam machining apparatus, focus positioning device for laser beam machining apparatus, and converged laser beam diameter measuring device'19994,735,523'Vibratory compaction working machine'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988Patents assigned to HITACHI CONSTRUCTION MACHINERY (1)· patent assignee history
1988Based in Tsuchiura, JP· patent location history
1999Patents assigned to MITSUBISHI ELECTRIC CORP (1)· patent assignee history
1999Based in Nagoya, JP· patent location history
2004Patents assigned to HITACHI LTD (1)· patent assignee history
2004Patents assigned to RENASAS TECHNOLOGY CORP (1)· patent assignee history
2004–2008Based in Takasaki, JP· patent location history
2006–2008Patents assigned to RENESAS TECH CORP (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
RENESAS TECH CORP32006–2008
HITACHI CONSTRUCTION MACHINERY11988
HITACHI LTD12004
MITSUBISHI ELECTRIC CORP11999
RENASAS TECHNOLOGY CORP12004
Locations
LocationPatentsSpan
Takasaki, JP52004–2008
Nagoya, JP11999
Tsuchiura, JP11988