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公开(公告)号：US20240257619A1
公开(公告)日：2024-08-01
申请号：US18631123
申请日：2024-04-10
Applicant: Panasonic Holdings Corporation
Inventor： NORIAKI IMAOKA , MIYUKI KITABATAKE , KOTA NAKAHIRA , TAKESHI ANDO , MASAKI YAMAMOTO , KENJI SUZUKI
Abstract: A two-way communication device system includes: a first two-way communication device; and a second two-way communication device installed at a different location from the first two-way communication device and configured to communicate with the first two-way communication device The two-way communication device system creates an operator input operation history when an input operation is received for the first time, transmits an input signal to the second two-way communication device, creates an other-device input operation history when an input signal is received for the first time, maintains a first state when both the operator input operation history and the other-device input operation history do not exist, a second state when only one of the operator input operation history and the other-device input operation history exists, and a third state when both of the operator input operation history and the other-device input operation history exist, and deletes both the operator input operation history and the other-device input operation history at a specific cycle date and time.
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公开(公告)号：US3417391A
公开(公告)日：1968-12-17
申请号：US57251066
申请日：1966-08-15
Applicant: TOKYO SHIBAURA ELECTRIC CO
Inventor： FUMIO ANDO , HIDEKAZU OKADA , TOORU MOGI
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公开(公告)号：US3187230A
公开(公告)日：1965-06-01
申请号：US81586059
申请日：1959-05-26
Applicant: EDWARDS COMPANY INC
Inventor： BRISTOVISH THOMAS G
IPC: G08B5/28
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公开(公告)号：US2335158A
公开(公告)日：1943-11-23
申请号：US37569141
申请日：1941-01-23
Applicant: WALTER RUDOLPH
Inventor： WALTER RUDOLPH
IPC: G08B5/28
CPC classification number: G08B5/28
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公开(公告)号：US1465301A
公开(公告)日：1923-08-21
申请号：US31732119
申请日：1919-08-13
Applicant: THOMAS GROVES
Inventor： THOMAS GROVES
IPC: G08B5/28
CPC classification number: G08B5/28
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公开(公告)号：US1334047A
公开(公告)日：1920-03-16
申请号：US31660419
申请日：1919-08-11
Applicant: JACOB B BANDER
Inventor： POWERS TIMOTHY B
IPC: G08B5/28
CPC classification number: G08B5/28
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公开(公告)号：US2314584A
公开(公告)日：1943-03-23
申请号：US35999340
申请日：1940-10-07
Applicant: KRITZ LEO L
Inventor： KRITZ LEO L
CPC classification number: G08B5/28 , G01N33/68 , Y10T74/11 , Y10T137/8175
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公开(公告)号：US1873419A
公开(公告)日：1932-08-23
申请号：US24661928
申请日：1928-01-13
Applicant: CHAS CORY CORP
Inventor： JONES JOSEPH S
IPC: G08B5/28
CPC classification number: G08B5/28
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公开(公告)号：US1638827A
公开(公告)日：1927-08-16
申请号：US9894826
申请日：1926-04-01
Applicant: CAIN EMMETT J
Inventor： CAIN EMMETT J
IPC: G08B5/28
CPC classification number: G08B5/28
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公开(公告)号：US1587125A
公开(公告)日：1926-06-01
申请号：US68751724
申请日：1924-01-21
Applicant: LEICH ELECTRIC CO
Inventor： LEICH OSCAR M
IPC: G08B5/28
CPC classification number: G08B5/28
