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Greenfield Tap & Die (Greenfield, MA) -
Brands, Trade Names & Trademarks
- Lightening (All Products) (First Use by Greenfield & Predecessors since July, 1874)
- O.K. (All Products) (First Use by Greenfield & Predecessors since December, 1912)
- GTD Symbol - G and D inside shaded area, T in center (First Use 10/1/1915) Image Link
- Unknown Trademark #147,321 - Not in TSDR
- GTD Symbol - See GTD Symbol above, no shaded area (First Use 10/1/1915) Image Link
