L
- Laches 2190

- Lack of unity of invention 823; 1844.01; 1845.01; 1850

- Lack of utility 608.01(p); 706.03(a)

- Language, Offensive 608; 1504.01(e)

- Language of papers 608.01

- Late payment of issue fee 711.03(c)

- Law, new interpretation of 1207

- Laws, Patent (See Statutes)

- Legal representative refuses to sign 409.03(c)

- Letter (See also Action, Form letters and forms, and Letter, Examiner’s)

- Letter, Examiner’s (See Examiner’s Letter)

- Letters, receipt and handling 500

- Letters of administration 409.01(b); 409.01(c); 409.01(e)

- Letters testamentary 409.01(b)

- Library, Scientific (See Scientific and Technical Information Center (STIC))

- Library services 901.06(a)

- Libreville Agreement (See also Treaties) 201.13

- License agreements under patent 301

- License rights clause 310

- License to file foreign application 115; 140; 706.03(s)

- License to file international application 140; 1832

- Licensee, access 106.01

- Licensing and Review section 115; 120; 140; 150; 502; 502.01; 706.03(b); 706.03(s)

- Linking claim 806.04; 806.05(c); 809; 809.03; 821.04(a)

- List of countries giving right of priority 201.13

- List of decisions II

- List of prior art in reexamination 2257; 2657

- Literature citation in specification 608.01(p)

- Litigation information, Duty to disclose 2001.06(c)

- Litigation not stayed in reissue 1442.02

- Litigation, reexamination copending

- Litigation related reissue 1404; 1442.01 - 1442.05

- Litigation, stays 1442.03; 1442.05; 2686.04

- Living matter (See also Biotechnology) 2105

- Local representative of attorneys 408

- Locarno international classification designation 903.09(a)
