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NL280269A - - Google Patents

Info

Publication number
NL280269A
NL280269A NL280269A NL280269A NL280269A NL 280269 A NL280269 A NL 280269A NL 280269 A NL280269 A NL 280269A NL 280269 A NL280269 A NL 280269A NL 280269 A NL280269 A NL 280269A
Authority
NL
Netherlands
Application number
NL280269A
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
Priority claimed from US9418A external-priority patent/US3038801A/en
Priority claimed from FR884315A external-priority patent/FR1348358A/fr
Application filed filed Critical
Publication of NL280269A publication Critical patent/NL280269A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/264—Supplying of photographic processing chemicals; Preparation or packaging thereof
    • G03C5/266—Supplying of photographic processing chemicals; Preparation or packaging thereof of solutions or concentrates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
NL280269A 1960-02-18 1962-06-28 NL280269A (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US9418A US3038801A (en) 1960-02-18 1960-02-18 Photographic pyrazolidone developers in non-aqueous organic solvents
SE681461 1961-06-30
FR884315A FR1348358A (fr) 1962-01-09 1962-01-09 Perfectionnements apportés aux révélateurs photographiques

Publications (1)

Publication Number Publication Date
NL280269A true NL280269A (fr) 1964-12-10

Family

ID=31499001

Family Applications (1)

Application Number Title Priority Date Filing Date
NL280269A NL280269A (fr) 1960-02-18 1962-06-28

Country Status (2)

Country Link
CH (1) CH432241A (fr)
NL (1) NL280269A (fr)

Also Published As

Publication number Publication date
CH432241A (fr) 1967-03-15

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