Patent ID: 11896144
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC A  G | IPC A  G

Claim 12:
13. The method of claim 7, wherein the first shelf is one of a plurality of shelves,
wherein each of the shelves comprises a plurality of pushers provided within tracks,
wherein the first track is one of the tracks,
wherein the first pusher is one of the pushers,
wherein the field of view of the camera includes:
a plurality of counting devices mounted at the ends of the shelves, wherein portions of each of the counting devices comprise visible patterns thereon, wherein the portions of the counting devices are configured to rotate about axes in response to changes in position of one of the pushers within the one of the tracks, and
wherein the first counting device is one of the counting devices.