Inventor

Ryoji Iwakura

Inventor

Sayama, JP

Overview

1979–2008

Patent span

Physics

Primary field (CPC G)

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

G04Gprimary

G04GElectronic time-pieces24%

G04CElectromechanical clocks or watches18%

G04FTime-interval measuring12%

H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner12%

G01DMeasuring not specially adapted for a specific variable6%

G04BMechanically-driven clocks or watches6%

H02JElectric power networks6%

H03KPulse technique6%

H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses6%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution6%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1979–2005Patents assigned to CITIZEN WATCH CO LTD (7)· patent assignee history

1979–1984Based in Tokorozawa, JP· patent location history

1982Based in Saitama, JP· patent location history

2004–2005Based in Sayama, JP· patent location history

2008Patents assigned to CITIZEN HOLDINGS CO LTD (1)· patent assignee history

2008Based in Tokyo, JP· patent location history

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CITIZEN WATCH CO LTD	7	1979–2005
CITIZEN HOLDINGS CO LTD	1	2008

Locations