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Inventor

Eizo Katayama

Inventor
Yokohama, JP

Overview

6→
Patents
1977–2006
Patent span
Electricity
Primary field (CPC H)

Patents· 6 as inventor

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

H04Mprimary
H04MTelephonic communication38%
G11BInformation storage based on relative movement between record carrier and transducer25%
G08BSignalling systems, e.g. personal calling systems13%
H04NPictorial communication, e.g. television13%
Y10TTechnical subjects covered by former us classification13%
PatentTitleYear
7,006,261'Modulator and demodulator (MODEM)'20066,038,252'Modulator and demodulator (MODEM)'20005,946,348'Modulator and demodulator (MODEM)'19995,661,709'Digital signal detection circuit'19974,839,879'Method for recording data on non-defective sectors of an optical disk'19894,035,791'Door alarm controlled by operation of door lock'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to KATAYAMA EIZO (1)· patent assignee history
1977Based in Shiga, JP· patent location history
1989–2000Patents assigned to MATSUSHITA GRAPHIC COMMUNIC (3)· patent assignee history
1989Based in Yokohoma, JP· patent location history
1997Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (1)· patent assignee history
1997–2000Based in Yokohama, JP· patent location history
2006Patents assigned to PANASONIC COMM CO LTD (1)· patent assignee history
2006Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MATSUSHITA GRAPHIC COMMUNIC31989–2000
KATAYAMA EIZOself11977
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11997
PANASONIC COMM CO LTD12006
Locations
LocationPatentsSpan
Yokohama, JP31997–2000
Kanagawa, JP12006
Yokohoma, JP11989
Shiga, JP11977