Hacker News
- Apparatus for facilitating the birth of a child by centrifugal force (1963) https://patents.google.com/patent/US3216423A/en 212 comments
- Apparatus for facilitating the birth of a child by centrifugal force https://patents.google.com/patent/US3216423A/en 2 comments
Linked pages
Related searches:
Search whole site: site:patents.google.com
Search title: US3216423A - Apparatus for facilitating the birth of a child by centrifugal force - Google Patents
See how to search.