It depends on the message you're trying to send.
No. You could copyright a drawing or photograph of the logo but the logo itself would have to be protected as a trademark.
A sandwich would only be protected by copyright if it were literally a work of art. You may trademark a sandwich (the Filet o' Fish, for example, is a registered trademark), but this can be expensive. There are also a few sandwich patents, such as the "sealed crustless sandwich" known as Uncrustables.
A trademark would only be useful if you were using it as a logo, i.e., a mark used in trade.
As works of art, yes. But as marks used in trade (a business or product logo, sports team name and indicia, etc), they are protected by trademark law.
Free logos can be found all over the internet. There are many websites that carry public domain or free art work that could be used as a logo. There are also magazines, books and newspapers that could also carry the free logos.
Probably not; patents can protect new and useful processes, machines, articles of manufacture, compositions of matter, and improvements thereto. A symbol used as a designation of a source of goods or services can be protected under trademark law. If the symbol is sufficiently original, copyright law may apply.
Technological design coures usually work with Mac computers and use Adobe Illustrator to create vector art for logos, and ect. Also to recreate logos and other artwork. Also work with Adobe Indesign and Adobe photoshop. They also seem to work with different file types changing and saving.
Mister Cartoon specializes in tattoo and commercial art. His work is inspired by graffiti and L.A. street life. He has worked on custom cars, album covers, advertisements, murals, logos, and more.
logistics
Christophe Szpajdel has written: 'Lord of the logos' -- subject(s): Heavy metal (Music) in art, Gothic type, Logos (Symbols)
Jack Gernsheimer has written: 'Designing logos' -- subject(s): Design, Industrial design coordination, Logos (Symbols), OverDrive, Art, Nonfiction
Benday dots, which are popular in pop art and are the trademark of Roy Lichtenstein, were invented by an illustrator named Benjamin Day from the United States.