NL183C -
Telephone porter
- Google Patents
Telephone porter
Info
Publication number
NL183C
NL183C
NL431A
NL431A
NL183C
NL 183 C
NL183 C
NL 183C
NL 431 A
NL431 A
NL 431A
NL 431 A
NL431 A
NL 431A
NL 183 C
NL183 C
NL 183C
Authority
NL
Netherlands
Prior art keywords
porter
telephone
telephone porter
Prior art date
1912-06-14
Application number
NL431A
Other languages
Dutch (nl )
Original Assignee
Bell Telephone Manufacturing Company 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.)
1912-06-14 Filing date
1912-06-14 Publication date
1914-04-15
1912-06-14
Application filed by Bell Telephone Manufacturing Company Sa
filed
Critical
Bell Telephone Manufacturing Company Sa
1912-06-14
Priority to NL431A
priority
Critical
patent/NL183C/en
1914-04-15
Application granted
granted
Critical
1914-04-15
Publication of NL183C
publication
Critical
patent/NL183C/en
Links
Classifications
H —ELECTRICITY
H04 —ELECTRIC COMMUNICATION TECHNIQUE
H04R —LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
H04R3/00 —Circuits for transducers, loudspeakers or microphones
Landscapes
Physics & Mathematics
(AREA )
Engineering & Computer Science
(AREA )
Acoustics & Sound
(AREA )
Signal Processing
(AREA )
NL431A
1912-06-14
1912-06-14
Telephone porter
NL183C
(en )
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
NL431A
NL183C
(en )
1912-06-14
1912-06-14
Telephone porter
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
NL431A
NL183C
(en )
1912-06-14
1912-06-14
Telephone porter
Publications (1)
Publication Number
Publication Date
NL183C
true
NL183C
(en )
1914-04-15
Family
ID=1771552
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
NL431A
NL183C
(en )
1912-06-14
1912-06-14
Telephone porter
Country Status (1)