A few years ago I came across the s30 design patents through a very rigorous (and crude) search through old nissan patents filed with the US. I remember saving the image on my old hard drive of a simple white and black "line art" Z. That hard drive is long gone, and I want to have those images again.

I tried searching through google patents and the closest thing I came across was this patent for a hood that looks like it might fit a Z:

Hood Patent

Does anyone know the patent number for the s30 design patent by nissan?

That is the add on that covered a hole in the hood for 74 models. the hole was a fix that dealers tried to solve the vapor lock issues with the 260's flat top carbs. Sorry I can't help with the original question, thought I would give info on what you found.

Dave

I'd did a google patent search and found patents covering the IRS design, side vent, steering, valve rocker arms, but noting covering the exterior design.

I'd did a google patent search and found patents covering the IRS design, side vent, steering, valve rocker arms, but noting covering the exterior design.

Can you post up the patent numbers for what you found? I'd like to see the ones for the side vents and rocker arms.