The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? ï¿½ single char wildcard, not at start
* ï¿½ multi char wildcard, not at start
"..." ï¿½ literal
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
For additional information on the Prior Art Database and its content, click here.
Inefficiency of electrical machines is mainly caused by electromagnetic losses, released in the form of heat. In permanent magnet generators, these losses mainly come from copper losses in the stator conductors, resulting in high temperature of the coils and especially of the end-windings which are surrounded by air....