241725, 260103, 260108, 260111, 260118, 260121, 280105 - Other notational signs and symbols, including pH, hazardous materials symbols, degree sign(�), pound sign(#), equal signs(=), and other mathematical symbols. Incomplete circles (more than semi-circles). Letters, numerals or punctuation forming or bordering the perimeter of a circle. Letters, numerals, punctuation, geometric figures, objects, humans, plants or animals comprising a circle. Three or more concentric circles. Circles that are totally or partially shaded. Inscriptions in Greek characters, including the following: Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ ς Σ σ Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω.