How about this:
"I have bike invention provisional patent and am looking for some bike company or person to partner up and develop my invention "
I bet a lot of bike companies look on CL for their next big idea...
I wonder what it is, perhaps a handlebar mount laptop so you can check CL on the road.
"I have 3rd grade English book. Use it as a guide to writing ads."
http://inlandempire.craigslist.org/bik/1146040435.html