Title:
Mattress alarm
United States Patent 3325799


Inventors:
Farris, Robert L.
Application Number:
US38225164A
Publication Date:
06/13/1967
Filing Date:
07/13/1964
Assignee:
Edwia, Greines Cohen
Primary Class:
Other Classes:
250/208.4, 250/221, 250/231.1, 340/665, 600/595
International Classes:
A61B5/11; A61B5/113
View Patent Images:
US Patent References:
3184961Optical strain gauge1965-05-25
3163856Alarm device for indicating lack of motion1964-12-29
3034341Devices for the determination of mechanical strains1962-05-15
3002185N/A1961-09-26
2831181Respiration monitoring device1958-04-15
2787834Grating strain gauges1957-04-09
2726380Sleep warning device1955-12-06
2666650Sound pickup and reproducing apparatus1954-01-19
2260715Circuit closer1941-10-28
1969554Automatic alarm switch1934-08-07
0884121N/A1908-04-07
Foreign References:
GB919765A1963-02-27