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Allen B du Mont Laboratories Inc
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Allen B du Mont Laboratories Inc
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Application filed by Allen B du Mont Laboratories IncfiledCriticalAllen B du Mont Laboratories Inc
Application grantedgrantedCritical
Publication of FR915560ApublicationCriticalpatent/FR915560A/fr
G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
G04D7/12—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard
G04D7/1207—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard only for measuring
G04D7/1214—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard only for measuring for complete clockworks
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR915560D1944-10-061945-10-06Procédé et appareil pour déterminer la précision de mouvements, notamment en horlogerie
ExpiredFR915560A
(fr)