Apple already sells t-shirts with the old logo, so this new trademark filing is a hint that hats and caps may be on the way. Alternately, it could be a move to keep people from making knock-off products.
The rainbow Apple logo was designed in 1977 when Steve Jobs and Steve Wozniak were making the Apple II desktop computer. The company continued to use the logo for 20 years, then switched to the single-color version that’s still in use today.
Of course, Apple isn’t saying what plans it has for the retro rainbow logo. If anything new does show up it’ll probably be at the Apple Park Campus visitor center.
[Thanks to The Blast for the heads up]