Which Logos

[bowiewhist]

I'm trying to solve a puzzle about international logos and am stuck on the last few
- any suggestions?
1) A small Parthenon with a side and front showing, white sloping roof, four columns front and side in green and sitting on a two-step plinth. Viewed as if from the left.
2)A shiny realistic conker emerging from its casing
3)A single palm tree in silhouette leaning slightly to the right set against the backdrop of a setting sun on a black square background. Appears to be a trademark. Base of tree trunk has two leaves or fronds, palm has ten "fronds".
4)A golden yellow square with a dark blue design which resembles an ear of wheat. Symmetrically the design either side of a "stalk" is three dark blue segments/leaves radiating out but together forming a curved square dissected by views of the golden background.
5) A green logo comprising a ring or loop sitting atop another smaller one upended but the lower one being only partly visible. From another perspective it resembles a stick man with a large head and arms outstretched to the side pointing down but with another pair pointing up!
Thanks

[Baldric]

Anything here that helps?
https://www.google.co.uk/search?q=international+logos+quiz+answers&;rls=com.microsoft:en-GB:IE-SearchBox&rlz=1I7PRFA_en&tbm=isch&tbo=u&source=univ&sa=X&ei=o9DHU92aIdKw7Abo-oD4DA&ved=0CB8QsAQ&biw=1280&;bih=526

[bowiewhist]

Sadly no - I did get some of the ones I have already from the internet. I've looked through all the logo quizzes I can find, all the trademark sites using the search facility but these I can't come up with. Thanks for the link Baldric.