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American Bar-Lock Co., Inc
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Bar-Lock Advertising Inkwell/Penholder
Bar-Lock Advertising Inkwell/Penholder
with square vault light cover for inkwell. Embossed:
"BAR-LOCK · PAT'D OCT.13-1903 · MAY 24-1904 · 2/3 ACTUAL SIZE"


  • Offices and Works: 26th and Pennsylvania Avenue, Philadelphia
  • New York Office: 160 Fifth Ave., New York
  • 245 W 28th, New York, NY (White-Orr's Reference Register for 1918-19)
  • Long Island City, New York
  • Represented in San Francisco by John McGuigan & Co.



  • Patents by William L. Caldwell
  • Incorporated 8/17/1921: "American Bar-Lock Co., Queens, skylights, $75,000; L. B. and D. E. Mulford, C. H. Law; attorneys, Caldwell & Polhemus, 50 Church St." —New York Times