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- Lanham Act ( See Trademark Act of 1946)
- Laudatory terms in marks— 1209.03(k)
- Legal advice, Office cannot render— 108.02 ; 1801 ; 1805
- Legal entity of applicant set forth in application— 803.03 ; 803.03(i)
- Letter of inquiry with respect to suspended application— 716.05
- Letter of protest in pending application ( See Protest, Letter of)
- Letterhead stationery as specimen of service mark use— 1301.04(c)
- License agreements, recording of— 503.02 ; 1906.01(h)
- Licensees, use of mark by— 1201.03(f)
- Likelihood of confusion
- actual confusion unnecessary— 1207.01(d)(ii)
- attack on registration improper in ex parte proceeding— 1207.01(d)(iv)
- between collective and other marks— 1304.08(b)
- classification not relevant— 1207.01(d)(v)
- collateral attack on registration improper in ex parte— 1207.01(d)(iv)
- consent between parties— 1207.01(d)(viii)
- design marks— 1207.01(c) – 1207.01(c)(iii)
- doubt resolved in registrant’s favor— 1207.01(d)(i)
- expansion of trade doctrine— 1207.01(a)(v)
- family of marks— 1207.01(d)(xi)
- famous mark— 1207.01(d)(ix)
- foreign equivalents— 1207.01(b)(vi)
- legal equivalents— 1207.01(c)(i)
- meaning, similarity in— 1207.01(b)(v)
- no per se rule— 1207.01(a)(iv)
- parody marks— 1207.01(b)(x)
- past decisions of examining attorneys— 1207.01(d)(vi) ; 1216 – 1216.02
- pharmaceuticals or medicinal products— 1207.01(d)(xii)
- reliance on identification of goods/services in application/registration— 1207.01(a)(iii)
- similarity of— 1207.01(b)
- similarity of marks— 1207.01(b) – 1207.01(b)(x)
- sophisticated purchasers— 1207.01(d)(vii)
- sound, similarity in— 1207.01(b)(iv)
- third-party registrations— 1207.01(d)(iii)
- transposition of terms— 1207.01(b)(vii)
- unity of control— 1201.07 – 1201.07(b)(iv)
- weak marks— 1207.01(b)(ix)
- Limited liability company— 803.03(h)
- Limited liability corporation— 803.03(h)
- Limited liability partnership—
803.03(k)
- signature by— 611.06(h)
- Lining statement— 808.01(b)
- Living individual, name or likeness of ( See Consent to register by living individual)
- Loss of papers— 305.02(f) ; 305.03 ; 1711 ; 1712.01 ; 1712.02(a)
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