公开(公告)号：US2894679A

公开(公告)日：1959-07-14

申请号：US39383653

申请日：1953-11-23

Applicant: WISCONSIN ALUMNI RES FOUND

Inventor： HERB RAYMOND G

IPC: H01J41/16

CPC classification number: H01J41/16

公开(公告)号：US2888189A

公开(公告)日：1959-05-26

申请号：US57352256

申请日：1956-03-23

Applicant: WISCONSIN ALUMNI RES FOUND

Inventor： HERB RAYMOND G

IPC: H01J41/12 ,  H01J41/16

CPC classification number: H01J41/16 ,  H01J41/12