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公开(公告)号:US1624174A
公开(公告)日:1927-04-12
申请号:US71669624
申请日:1924-05-29
Applicant: DICTAPHONE CORP
Inventor: LUCARELLE JOSEPH M , FRYKMAN VICTOR L
IPC: F16D25/08
CPC classification number: F16D25/088
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公开(公告)号:US1892269A
公开(公告)日:1932-12-27
申请号:US29850428
申请日:1928-08-09
Applicant: DICTAPHONE CORP
Inventor: FRYKMAN VICTOR L
IPC: G11B17/02
CPC classification number: G11B17/02
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公开(公告)号:US1785409A
公开(公告)日:1930-12-16
申请号:US20784827
申请日:1927-07-23
Applicant: DICTAPHONE CORP
Inventor: FRYKMAN VICTOR L
IPC: G11B17/02
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公开(公告)号:US1968558A
公开(公告)日:1934-07-31
申请号:US34721129
申请日:1929-03-15
Applicant: DICTAPHONE CORP
Inventor: JOHNSON MANFRED J , FRYKMAN VICTOR L
CPC classification number: G11B25/02
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公开(公告)号:US1740425A
公开(公告)日:1929-12-17
申请号:US21733727
申请日:1927-09-03
Applicant: DICTAPHONE CORP
Inventor: FRYKMAN VICTOR L
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公开(公告)号:US1723569A
公开(公告)日:1929-08-06
申请号:US18709427
申请日:1927-04-27
Applicant: DICTAPHONE CORP
Inventor: LUCARELLE JOSEPH M , FRYKMAN VICTOR L
IPC: G11B25/02
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公开(公告)号:US2152440A
公开(公告)日:1939-03-28
申请号:US4357635
申请日:1935-10-04
Applicant: DICTAPHONE CORP
Inventor: NORTON LELAND D , FRYKMAN VICTOR L
IPC: H04R11/08
CPC classification number: H04R11/08
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公开(公告)号:US2110092A
公开(公告)日:1938-03-01
申请号:US9065436
申请日:1936-07-15
Applicant: DICTAPHONE CORP
Inventor: NORTON LELAND D , FRYKMAN VICTOR L
IPC: H04R11/08
CPC classification number: H04R11/08
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