Inventor
Edward M. Springer
Inventor
Chicago, IL, US
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B41Cprimary
B41CProcesses for the manufacture or reproduction of printing surfaces25%
H04NPictorial communication, e.g. television25%
B41LApparatus or devices for manifolding, duplicating or printing for office or other commercial purposes17%
F04DNon-positive-displacement pumps17%
LOC238%
LOCD28%
PatentTitleYear
D0521624'Bi-plane ceiling fan'20066,695,585'Ceiling fan blade frame'20046,419,451'Ceiling fan blade frame'20024,330,798'Electronic stencil cutter'19824,319,253'Electronic stencil cutter'19824,268,869'Electronic stencil cutter having means to vary size of reproduced picture'1981D0250768'Lawn sprinkler'19794,030,412'Duplicating machine'19773,941,054'Stencil gripping apparatus for a duplicating machine'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1982Patents assigned to HEYER INC (4)· patent assignee history
1976–1982Based in Chicago, IL, US· patent location history
1979–1982Patents assigned to SPRINGER EDWARD M (2)· patent assignee history
1982Patents assigned to CLAY WALLACE C (1)· patent assignee history
1982Patents assigned to HEYER ARTHUR J (1)· patent assignee history
2002–2006Patents assigned to EMERSON ELECTRIC CO (3)· patent assignee history
2002–2006Based in Chesterfield, MO, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HEYER INC | 4 | 1976–1982 |
| EMERSON ELECTRIC CO | 3 | 2002–2006 |
| SPRINGER EDWARD Mself | 2 | 1979–1982 |
| CLAY WALLACE C | 1 | 1982 |
| HEYER ARTHUR J | 1 | 1982 |
Locations
| Location | Patents | Span |
|---|---|---|
| Chicago, Illinois, US | 6 | 1976–1982 |
| Chesterfield, MO, US | 3 | 2002–2006 |