Backyard Aquaponics
A place to discuss aquaponics

here are two links to sites where you can view patents:

http://www.espacenet.com/access/index.en.htm
where you can choose your language
i.e. English (but many more are available, including a.o. Croatian !)
http://gb.espacenet.com/search97cgi/s97 ... vanced.hts
just fill in and search
then refine your search if too many patents come up

and
http://www.wipo.int/pctdb/en/
same here

great sites to do your research on whatever subject
on the Espacenet page you can also find out the status of a patent if the info is available
in other words if and where a patent is still valid or expired

remember you can use any patent for your own purposes as long as they are not commercial in which case there could be asked for a license fee to pay
check with the owner

greetings

frank

And for the United States: http://www.uspto.gov