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Inventor

Charles B. Clark

Inventor
Los Altos, CA, US

Overview

4→
Patents
1976–1994
Patent span
Physics
Primary field (CPC G)

Patents· 4 as inventor

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

G03Gprimary
G03GElectrography33%
A47CChairs17%
G01BMeasuring length, thickness or similar linear dimensions17%
G01DMeasuring not specially adapted for a specific variable17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
PatentTitleYear
5,325,553'Mattress spring structure with reinforcing frame in the lumbar area'19944,733,235'Capacitance type displacement measuring instrument'19883,999,687'Toner concentration detector'19763,970,036'Toner concentration detector for dry powder magnetic brush toning system'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976Patents assigned to SAVIN BUSINESS MACHINES CORP (2)· patent assignee history
1976–1988Based in Los Altos, CA, US· patent location history
1988Patents assigned to MITUTOYO MFG CO LTD (1)· patent assignee history
1994Patents assigned to NAMACO ENTERPRISES (1)· patent assignee history
1994Based in Huntington, WV, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SAVIN BUSINESS MACHINES CORP21976
MITUTOYO MFG CO LTD11988
NAMACO ENTERPRISES11994
Locations
LocationPatentsSpan
Los Altos, California, US31976–1988
Huntington, WV, US11994