I'm building my own site some time ago. I thought, I will include the discovery/search feature on image copy spaces also. Recently I saw the � mark near the CopySpace on iStock. I'm unable to find anything related to this trademark on iStock...

However I see on many sites the term "Copy Space"...

Can somebody enlighten me, will I infringe somebody's copyright by including a similar copy space search functionality or even the term "Copy Space" cannot be used???

Thank you for that link!

Exactly I'm interested on the ability to reproduce something similar they have on their site. My version would be a 3x3 or 4x4 matrix, the selected squares meaning almost uniform colors (space suitable for text).

Regarding the content on the link http://tsdr.uspto.gov/documentviewer?caseId=sn78766484&docId=APP20051208085810#docIndex=16&page=1 says "The mark consists of standard characters, without claim to any particular font, style, size, or color."
If I understand correctly, the name "copyspace" is trademarked, NOT the functionality (?).

So I can build a similar search functionality, just name it otherwise than "copyspace" (??)

Thank you for that link!

Exactly I'm interested on the ability to reproduce something similar they have on their site. My version would be a 3x3 or 4x4 matrix, the selected squares meaning almost uniform colors (space suitable for text).

Regarding the content on the link http://tsdr.uspto.gov/documentviewer?caseId=sn78766484&docId=APP20051208085810#docIndex=16&page=1 says "The mark consists of standard characters, without claim to any particular font, style, size, or color."
If I understand correctly, the name "copyspace" is trademarked, NOT the functionality (?).

So I can build a similar search functionality, just name it otherwise than "copyspace" (??)

I think you're correct with that.  In order to cover the functionality I believe they would need a patent and it would probably be specific to how they achieve the results, not the end results.  All they've done is trademark the use of the phrase CopySpace as one word to describe the tool on their site.  Curious (or just sloppy) that they have it as TM instead of (R) since they were granted registration in 2007.  The TM means you've applied for the trademark registration whereas the R in the circle indicates it was granted and you own the trademark so I would think they should have updated the site to use the R now.