FR864427A - Improvement in sound tracking devices - Google Patents

Improvement in sound tracking devices

Info

Publication number
FR864427A
FR864427A FR864427DA FR864427A FR 864427 A FR864427 A FR 864427A FR 864427D A FR864427D A FR 864427DA FR 864427 A FR864427 A FR 864427A
Authority
FR
France
Prior art keywords
improvement
tracking devices
sound tracking
sound
devices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compteurs Schlumberger SA
Original Assignee
Compteurs Schlumberger SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compteurs Schlumberger SA filed Critical Compteurs Schlumberger SA
Application granted granted Critical
Publication of FR864427A publication Critical patent/FR864427A/en
Expired legal-status Critical Current

Links

FR864427D 1939-12-09 1939-12-09 Improvement in sound tracking devices Expired FR864427A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR864427T 1939-12-09

Publications (1)

Publication Number Publication Date
FR864427A true FR864427A (en) 1941-04-26

Family

ID=9343859

Family Applications (1)

Application Number Title Priority Date Filing Date
FR864427D Expired FR864427A (en) 1939-12-09 1939-12-09 Improvement in sound tracking devices

Country Status (1)

Country Link
FR (1) FR864427A (en)

Similar Documents

Publication Publication Date Title
FR869542A (en) Further training in frequency changing devices
FR913541A (en) Bra refinements
FR862867A (en) Loud speaker
FR862487A (en) Locking device improvements
FR952042A (en) Improvements to electro-magnetic switching devices
FR859945A (en) Enhancements to balanced suspension systems
FR864427A (en) Improvement in sound tracking devices
FR859322A (en) Bra enhancements
FR853623A (en) Headquarters improvements
FR860192A (en) Collimator refinements
FR865662A (en) Brake improvements
FR864402A (en) Improvement in echo tracking devices
FR864172A (en) Sound tracking device
FR860459A (en) Improvements to self-adhesive devices
FR860598A (en) Pinpoint refinements
FR856017A (en) Curler enhancements
FR864832A (en) Brake improvements
FR859713A (en) Improvements to size adjustment devices
FR864546A (en) Advanced device for sound tracking
FR863166A (en) Brooch enhancements
FR861384A (en) Improvements in photoelectric devices
FR50336E (en) Vaporizer enhancements
FR862060A (en) Straps enhancements
FR863308A (en) Enhancements to t devices. s. f.
FR867849A (en) Acoustic devices