1. American Paper Optics - A manufacturer of 3D and novelty glasses. 2. Fireworks Glasses.com - Holographic diffraction grating lenses for viewing fireworks displays, laser light shows, holiday and city lights and for the study of light and color. 3. 3D Glasses Direct - Manufacturer of 3D Glasses including fireworks glasses, solar eclipse viewers, and holographic diffraction grating films. 4. Rainbow Symphony Inc. - Manufacturers of 3D glasses including fireworks glasses, solar eclipse viewers, and diffraction grating films. 5. Spenser Corporation - 3D glasses, paper sunglasses for premium and promotional use.

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