Where are the Aperture Science Logos?
Solution 1:
I can't remember encountering the name or logo at any point in the first Half-Life, nor any (unused) texture in the Hammer Editor referencing it (I rechecked to be sure).
According to the Fandom wiki entry on Aperture Science, there is no appearance in Half-Life.
This is corroborated by the Combine OverWiki.