I'm 100% sure you've done either of the following:
1. Saved these from the TF2 Wiki (in which case, I made those, the ones on wiki.teamfortress.com came from my PSD file that I sent to Darkid)
2. Ripped these from my TF2 Class Emblem PSD file that I used to have up on GameBanana (now available here:
http://www.unfgaming.net/downloads/TF2 Class Emblems v5.psd)
3. Used the PSD file or the TF2 Wiki to assist in creating vectorized versions.
Some specifics:
- There was no guard dog emblem in high resolution until I created it (494x494 IIRC). Even so, the Guard Dog emblem is only available in my PSD file,
so that's my absolute dead giveaway that you've used my PSD file.
- The Civilian/Miss Pauling/Administrator emblems were given to me by Rebbacus. They were a tad lopsided so I had to touch things up. She released the emblems publicly on her blog though, so that's ok.
- The beta Heavy class emblem was created by a guy on the TF2 Wiki, and I (with his permission) incorporated it into my PSD file, so that's also ok.
If you're doing #3, just using the PSD file or the emblems off the Wiki to assist in creating a vectorized version, I'm ok with that.
If you've straight up used my PSD file, credit would be nice.
(oh, the Hammer emblem and the Duelling Minigame emblem, I've never seen those before, those must be original creations of someone else)