Robert Annen and the ball bearing Jean Lassale






^ list of patents filed robert annen found on espacenet
^ patent ca358852
^ patent ca355070a
^ patent ca350746a
^ patent ca355070a
^ patent ch458766a
^ patent us3447528a
^ patent ch314736a
^ patent us2688521a
^ patent de934379c
^ patent us2686397a
^ patent us2679440a
^ patent us2333970a
^ patent us2149492a






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