1
vote
2answers
114 views

How could a patent have been issued for a composite knife blade?

Turns out there's a US 2008/0250656 A1 patent for a composite knife blade - a knife blade made of two pieces - one containing the area near cutting edge and the other containing the rest of the blade ...
0
votes
0answers
88 views

What is differences between us8216392 and us7445677? [duplicate]

Possible Duplicate: is there an infringement between this patent and lufthansa us8216392 patent? us8216392 patent produced "cyclean" you can google for images and us7445677 drawings are ...
2
votes
1answer
995 views

Idea that is similar but not identical to an existing patent: how do I evaluate the novelty?

I came up with an idea similar to this one (us20070091093) around the same time and I've read this patent pretty thoroughly. They cover a large part of what my idea is, but I have differences in ...