Petersburg Animation Studio

Background
Petersburg Animation Studio is a Saint Petersburg-based Russian studio founded in March 2003 by Ilya Popov and Anatoly Prokhorov. The studio is mostly famous for their Kikoriki animated series which eventually became successful and spanned a cult following.

1st Logo (May 17, 2004-December 22, 2013)
Logo: On a white rectangle, we see a square which contains a white spiral P. Next to the spiral P is "СТУДИЯ КОМПЬЮТЕРНОЙ АНИМАЦИИ (the last two words are stacked)" (2004-2008)/"СТУДИЯ АНИМАЦИИ" (2008-2013). "ПЕТЕРБУРГ" is seen below the text.

Variants:
 * In the original 2004-2012 run of Kikoriki, the logo was placed under the Kikoriki emblem of the time which consisted of a simple daisy wheel on a blue rounded square. The emblem was also used as a screen bug on original prints of episodes up until episode 110 (The Right To Be Lonely), which is the first episode to not include the emblem as an on-screen bug.
 * Original prints of earlier episodes of Kikoriki had the logo placed over the credits' background instead of a fully black one. Post-2008 DVD prints use the regular black background instead.
 * On some episodes, a credit for Classica-Film (a company that was once responsible for the digital-to-film movie transferring) is seen.

Technique: None.

Music/Sounds: The closing theme of the episode.

Availability: Seen on Kikoriki, Kikoriki: New Adventures and the first two seasons of Kikoriki: Pin-Code.

2nd Logo (December 22, 2011, October 20, 2017)
Logo: On a black background, the spiral P from the previous logo is being formed. A square appears behind it, and the spiral P moves away to reveal the "СТУДИЯ АНИМАЦИИ" and "ПЕТЕРБУРГ" from the previous logo.

Variant: An English variant exists.

Technique: The spiral P forming and zooming out.

Music/Sounds: The opening theme to the movie.

Availability: Only seen on Kikoriki: Team Invincible. The English variant is seen on Shout! Factory prints of the aforementioned movie.

3rd Logo (January 25, 2015-)
Logo: Unknown.

Technique: Unknown.

Music/Sounds: Unknown.

Availability: Current. It initially debuted as an in-credit logo on episodes of Kikoriki: Pin-Code, and it was later seen on the studio's current projects like the Kikoriki: Legend of the Golden Dragon movie.