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Inventor

Dan W. Matthias

Inventor
Downingtown, PA, US

Overview

8→
Patents
1979–1986
Patent span
Performing operations
Primary field (CPC B)

Patents· 8 as inventor

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

B41Jprimary
B41JTypewriters43%
H02KDynamo-electric machines29%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests14%
A41FGarment fastenings7%
LOCD17%
PatentTitleYear
4,620,326'Adjustment means and garment'19864,507,000'Character print wheel with drive elements'19854,413,920'Printing ribbon cartridge with flexible ribbon guides'19834,290,704'Flexible ribbon guide means'19814,288,709'High performance stepper motor'19814,198,582'High performance stepper motor'1980D0253658'Printer/keyboard for an electronic typing system or similar article'19794,149,808'Linear drive for a printing apparatus'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1985Patents assigned to EXXON RESEARCH ENGINEERING CO (6)· patent assignee history
1979Patents assigned to EXXON RES & ENGINEERING CO (1)· patent assignee history
1979–1985Based in Downingtown, PA, US· patent location history
1979Based in Honey Brook, PA, US· patent location history
1986Patents assigned to MOTHERS WORK INC (1)· patent assignee history
1986Based in Philadelphia, PA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
EXXON RESEARCH ENGINEERING CO61979–1985
EXXON RES & ENGINEERING CO11979
MOTHERS WORK INC11986
Locations
LocationPatentsSpan
Downingtown, Pennsylvania, US61979–1985
Philadelphia, Pennsylvania, US11986
Honey Brook, Pennsylvania, US11979