Knapsack having a back wall formed with spacers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 3, 2004
Grant Date -
Sep 11, 2003
app pub date -
Mar 5, 2002
filing date -
Mar 5, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A knapsack is made of a hard thermoplastic material and is molded into a single-piece construction. The knapsack has a rear wall surface facing toward a user's back and formed with a plurality of spacers to result in a spacing between the rear wall surface and the user's back. As a result, the knapsack does not attach closely to the user's back and, therefore, permits air ventilation and can provide a massaging effect.
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