This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Patent image crop. en Patent No drawing cropped for close in of ball bearing mechanism google dq Donnell hl en sa ei OlBsVZDuFotoATKKADA ved CBQAEwAA Patent Office other versions PDUSGov Uploaded with Patent drawings
Page 2023 Free-images.com. All images are Public Domain