Communications: electrical – Systems – Call station
Patent
1975-09-08
1977-06-07
Caldwell, John W.
Communications: electrical
Systems
Call station
128 2R, 128 21A, 340279, G08B 2100
Patent
active
040286878
ABSTRACT:
An alarm apparatus for the delivery of livestock animals is inserted in the birth canal of a pregnant livestock animal such as a cow or a pig whose delivery is expected to be close at hand, so that it may warn of the onset of delivery and the necessity to take care for the delivery, etc. when it is pushed out of the birth canal by a fetus at the time of the onset of delivery.
REFERENCES:
patent: 1896071 (1933-02-01), Clark
patent: 3273559 (1966-09-01), Evans
patent: 3274994 (1966-09-01), Sturm
patent: 3583389 (1971-06-01), Harvey
Hamaguchi Sachihiko
Oomura Ikuo
Sato Tadashi
Wada Hisashi
Caldwell John W.
Groody James J.
Matsushita Electric - Industrial Co., Ltd.
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