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- Hague convention— 804.01(a)(i)
- Hand delivery of correspondence relating to Madrid applications— 1900
- Hand delivery of correspondence to USPTO— 307
- Hashtag marks— 1202.18
- Heading or caption for papers— 302.03(a) ; 302.03(b)
- Holiday ( See Federal holiday, response period ending on)
- Hologram— 807.01 ; 1202.14
- House mark— 1402.03(b)
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z