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

Claim 5:
6. The system of claim 1, wherein the storage unit comprises a plurality of pushers provided within tracks,
wherein each of the pushers is biased toward the front end of the storage unit by a spring, wherein the first track is one of the tracks,
wherein the first pusher is one of the pushers, and
wherein the system further comprises:
a plurality of counting devices mounted at the front end of the storage unit, 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,
wherein each of the portions of the counting devices is within the field of view of the camera, and
wherein the first counting device is one of the counting devices.