Progressive power lens
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 11, 2005
Grant Date -
Jun 10, 2004
app pub date -
Oct 16, 2003
filing date -
Oct 17, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A progressive power lens belonging to a series of lenses according to the present invention is provided. If a first lens and a second lens randomly chosen from the series of progressive power lenses have a common spherical refractive power Sph [diopter] in the distance portions thereof, the Sph is greater than or equal to +1, and a base curve BC1 of the first lens is smaller than a base curve BC2 of the second lens, the first and second lenses satisfy a condition: ##EQU1##
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully