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Although not strictly a radio or radio part manufacturer, I am including the Varley Duplex Magnet Company due to their closely related products.
The 20th Annual Report of the Commissioner Made to the General Assembly of the State of Rhode Island, directory of manufactures, 1907, Varley Duplex Magnet Company is listed in Phillipsdale, RI. 1 There is also a 1901 ad in the “Electrical Review” placing it in Phillipsdale. 2
 Jumphlame Autocoil, 1904
 Automatic Boil
Winding Mcahine, 1904
 Ignition Coil, 1904
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Jumphlame Autocoil, 1904
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Providence Journal, February 1, 1904
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American Electrician January, 1903
Providence Journal, June 13, 1903
American Electrical Worksvs Varley Duplex Magnet Company
In order to pin down exactly where Varley Duplex Magnet Company did business, I had to resort to Patent information. This came in the form of when the Patent was filed for, where the inventor was located and where the company was located. This is the breakdown.
| Patent | Invention | Applied For | Inventor | Inventor Location | Company | Company Location |
| US686561 | BATTERY GAGE | 1901 | CHARLES R. UNDERHILL | MONTCLAIR, NEW JERSEY | ASSIGNOR OF ONE HALF TO THE VARLEY DUPLEX MAGNET COMPANY | NEW JERSEY |
| US807133 | WINDING MACHINE | 1902 | A. D. SCOTT | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US728183 | PROCESS OF WINDING ELECTRICAL COILS | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US733609 | PROCESS OF WINDING FLAT WIRE | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US734778 | ELECTRICAL HELIX | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US736178 | PROCESS OF COVERING WIRE | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US736319 | ELECTRIC COIL | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US743779 | PROCESS OF WINDING ELECTRICAL GOILS | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US744650 | ELECTRIC COIL TERMINAL | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US748442 | VIBRATOR FOR INDUCTION COILS | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US757524 | INDUCTION 0011. | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US776705 | INDUCTION COIL | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US789465 | PAPER SLITTING MACHINE | 1903 | R. VARLEY & A. BAUSCH | PROVIDENCE, RHODE ISLAND/JERSEY CITY, NEW JERSEY, | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US798641 | MACHINERY FOR MAKING ELECTROMAGNETS | 1903 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US743737 | TAPPING MACHINE | 1903 | R. C. LEWIS | STAMFORD, CONNECTICUT | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US757526 | LOCK NUT | 1904 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US757527 | VIBRATOR FOR INDUCTION COILS | 1904 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US757792 | CIRCUIT CONTROLLER FOR INDUCTION COILS | 1904 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US762776 | INDUCTION COIL VIBRATOR | 1904 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US772591 | INDUCTION COIL | 1904 | R. VARLEY | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US775665 | CIRCUIT CONTROLLER | 1904 | A. D. SCOTT | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US779231 | INDUCTION COIL | 1904 | A. G. MEYERS | EAST PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | PHILLIPSDALE, RHODE ISLAND |
| US1068825 | WINDING MACHINE | 1904 | A. D. SCOTT | PROVIDENCE, RHODE ISLAND | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US899770 | IGNITION SYSTEM FOR EXPLOSION ENGINES | 1907 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US915390 | IGNITION SYSTEM FOR EXPLOSION ENGINES | 1907 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1167720 | MACHINE FOR WINDING COILS | 1910 | A. D. SCOTT | JERSEY CITY, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1047899 | COIL FORMER | 1911 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1064936 | WIRE STRETGHING DEVICE | 1911 | A. D. SCOTT | JERSEY CITY, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1073059 | METHOD OF MAKING COILS | 1911 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1073060 | ELECTRIC COIL | 1911 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1110086 | POWER SYSTEM FOR AUTOVEHICLES | 1911 | R. VARLEY & W. W. MAGFARREN | ENGLEWOOD, NEW JERSEY, PITTSBURGH, PENNSYLVANIA | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1047721 | APPARATUS FOR MAKING COILS | 1912 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1072279 | STARTER APPARATUS AND SYSTEM FOR AUTOVEHICLES | 1912 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1129147 | POWER SYSTEM FOR AUTOVEHICLES | 1912 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1167721 | MANDREL FOR WINDING COILS | 1912 | A. D. SCOTT | JERSEY CITY, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1167722 | METHOD OF WINDING AND THE PRODUCT THEREOF | 1912 | A. D. SCOTT | JERSEY CITY, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1177370 | ELECTRICAL SYSTEM FOR AUTOVEHICILES | 1912 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1185151 | ELECTRICAL SYSTEM FOR AUTOVEHICILES | 1912 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1261074 | POWER SYSTEM | 1912 | R. VARLEY & W. W. MAGFARREN | ENGLEWOOD, NEW JERSEY, PITTSBURGH, PENNSYLVANIA | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1146976 | IGNITION APPARATUS | 1913 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1172909 | SYSTEM FOR AUTOVEHÍCLES | 1913 | A. D. SCOTT | JERSEY CITY, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1198794 | ELECTRICAL SYSTEM | 1914 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1172910 | MANDREL FOR WINDING COILS | 1915 | A. D. SCOTT | JERSEY CITY, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1361651 | BATTERY PROTECTING DEVICE FOR CHARGING AND LIGHTING SYSTEMS | 1919 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1482167 | CIRCUIT CONTROLLER | 1919 | R. VARLEY | EAST ORANGE, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1427509 | WINDING MACHINE | 1920 | J. C. ANDERSON | EAST ORANGE, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1438003 | ELECTRICAL SWITCH DEVICE | 1920 | R. VARLEY | EAST ORANGE, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1485098 | AUTOMOBILE ALARM SYSTEM | 1920 | R. VARLEY | EAST ORANGE, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1525420 | ELECTRIC CONTROLLING DEVICE FOR AUTOMOBILES | 1921 | R. VARLEY | EAST ORANGE, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1528590 | HEADLIGHT CONTROL | 1921 | R. VARLEY | EAST ORANGE, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1593230 | ARMATURE FOR MAGNETOS AND THE LIKE | 1921 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1534813 | WINDING MACHINE | 1923 | A. D. SCOTT | JERSEY CITY, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1589435 | MECHANISM FOR CONTROLLING THE UNWINDING 0F STRAND MATERIAL AND GUIDING THE SAME | 1923 | A. D. SCOTT | JERSEY CITY, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1658911 | MOTOR DRIVEN VEHICLE | 1923 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1659062 | COIL MOUNTING | 1926 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
| US1662765 | ADJUSTABLE 00 IL MOUNTING | 1926 | R. VARLEY | ENGLEWOOD, NEW JERSEY | VARLEY DUPLEX MAGNET CO. | NEW JERSEY |
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