Joseph John O'Connell (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Joseph John O'Connell" in English language version.

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1csbsju.edu

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encyclopedia.chicagohistory.org

Illinois Bell Telephone Co

csbsju.edu

"The Joe O'Connell Collection – CSB/SJU". www.csbsju.edu. Retrieved 2016-12-07.

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O'Connell, Joseph John. "Telephone exchange apparatus, US Patent No. 417,271" (PDF). United States Patent Office.
"J.J. O'Connell. Testing Apparatus for Telephone Exchange Switches" (PDF). United States Patent Office.
O'Connell, Joseph John. "Telephone-exchange apparatus, US Patent No. 430,747" (PDF). United States Patent Office.
O'Connell, Joseph John. "Telephone-exchange key board apparatus, US Patent No. 430,748" (PDF). United States Patent Office.
O'Connell, Joseph John. "Metallic circuit test and time signal for telephone exchanges, US Patent No. 454,016" (PDF). United States Patent Office.
O'Connell, Joseph John. "Telephone Switching Apparatus and Circuit" (PDF). United States Patent Office.
O'Connell, Joseph John. "Switch and circuit for telephone exchanges, US Patent No. 515,531" (PDF). United States Patent Office.
O'Connell, Joseph John. "Signaling apparatus for telephone exchange circuits, US Patent No. 587,226" (PDF). United States Patent Office.
O'Connell, Joseph John. "Telephone exchange apparatus, US Patent No. 544,901" (PDF). United States Patent Office.
O'Connell, Joseph John. "Signaling circuit, US Patent No. 555,707" (PDF). United States Patent Office.
O'Connell, Joseph John. "Telephone trunk circuit, US Patent No. 587,226" (PDF). United States Patent Office.
O'Connell, Joseph John. "Signaling apparatus for telephone switchboards, US Patent No.652,977" (PDF). United States Patent Office.
O'Connell, Joseph John. "Apparatus for telephone switchboards, US patent No. 645,758" (PDF). United States Patent Office.
O'Connell, Joseph John. "Calling apparatus for party telephone-lines, US patent No. 647,515" (PDF). United States Patent Office.
O'Connell, Joseph John. "Coin collector for telephone toll lines, US Patent No. 704,268" (PDF). United States Patent Office.
O'Connell, Joseph John. "Cable terminal, US Patent No. 727, 829" (PDF). United States Patent Office.
O'Connell, Joseph John. "Telephone exchange system, US Patent No. 730,291" (PDF). United States Patent Office.
O'Connell, Joseph John. "Busy test apparatus for telephone switchboards, US Patent No. 736,002" (PDF). United States Patent Office.
O'Connell, Joseph John. "Earth or ground wire attachment, US Patent No. 762,341" (PDF). United States Patent Office.
O'Connell, Joseph John. "Apparatus for amplifying or reinforcing telephone currents, US Patent No, 760,143" (PDF). United States Patent Office.

thenewsleaders.com

"Long-distance memories rush back to O'Connell - The Newsleaders". Retrieved 2023-10-21.