look at philips.com they have id tags in all sort's for instance creditcart
shape
you activate them in an electro magnatic feeld some you can program a number in
some contain eeprom etc
Marcel
Electronic Workshop Scope
Amstedam
marbel@xs4all.nl

jhobbs wrote:

> Someone a while back listed some manufactures of those small ID transmitters
> that I think are used to implant under a pets skin.  I am looking for data
> on these devices so any source would be helpful.
>
> Has anyone ever used these devices?
> What is the correct name for these devices?
>
> Take care  -Jim