Umbrella
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 29, 1990
Issued Date -
N/A
app pub date -
Jul 28, 1989
filing date -
Aug 8, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An automatic umbrella includes a central post, a canopy assembly, and a spring and linkage mechanism which causes the umbrella to open when desired. There is also commonly a feature used for securing the umbrella in the closed position.
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Cited Art Landscape
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