Memory device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 1, 1985
Issued Date -
N/A
app pub date -
Apr 18, 1984
filing date -
Mar 4, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A portable credit device for use in a credit control system has an electrochromic cell display, which contains a transition metal oxide that can color cathodically by reduction or anodically by oxidation. This enables a permanent, unpowered memory to be achieved. A credit control system is also disclosed in which the portable credit device can be used.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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