01.15.24 -

Sound waves, including designs depicting sound

15.05.07 -

Computer processing and data storage devices, not including computer terminals or devices or media for mere storage or playback of data, audio, or video

15.09.25 -

Electrical circuitry and power hardware and routing devices, including circuitry, chargers, fuses, and controllers, but not including mere cables

26.01.01 -

Circles as carriers or as single line borders

26.01.21 -

Circles that are totally or partially shaded

26.09.02 -

Plain single line squares

26.11.13 -

Two rectangles

26.11.16 -

Rectangles touching or intersecting