Guide to STN Patent Databases – Basic Version - Paton - TU Ilmenau

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Guide to STN Patent Databases
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (typewriters B41J;
order telegraphs, fire or police telegraphs G08B; visual telegraphy G08B, G08CC; teleautographic
systems G08C; ciphering or deciphering apparatus per se G09C; coding, decoding or code conversion, in
general H03M; arrangements common to telegraphic and telephonic communication H04M; selecting
H04Q)
H04L001/00 Arrangements for detecting or preventing errors in the information received (correcting synchronisation
H04L 7/00; for digital computers G06F 11/00 ; arrangements in the transmission path H04B)
H04L1/00A
allocation for multicarrier modulation H04L27/26M1A; controlling transmission power for radio
systems H04B7/005B)] [N9911]
H04L1/00A1 ransmission rate] [N9911]
H04L1/00A1M
H04L1/00A3
H04L1/00A3L
H04L1/00A5
H04L1/00A7
H04L1/00B [N: by using error correcting codes (in general H03M 13/00)]
H04L1/00B1 [N: by using block codes]
H04L1/00B2 [N: by using convolutional codes]
H04L1/00B2B -likelihood or sequential algorithm,
i.e. Viterbi, Fano, ZJ algorithms]
The format of the EPC was streamlined with IPC. Use the EXPAND command to find out about the format:
=> FIL INPADOCDB
=> E H04L/EPC
E# FREQUENCY AT TERM
-- --------- -- ----
E1 0 1 H04K0003-00 (C0608)/EPC
E2 0 0 H04K;/EPC
E3 648483 1651 --> H04L/EPC
E4 0 0 H04L)/EPC
E5 83888 1651 H04L0001/EPC
E6 1058 171 H04L0001-00/EPC
E7 7 H04L0001-00+IDT/EPC
E8 2280 41 H04L0001-00A/EPC
E9 2977 10 H04L0001-00A1/EPC
E10 367 9 H04L0001-00A13/EPC
E11 415 8 H04L0001-00A13B/EPC
E12 115 8 H04L0001-00A13D/EPC
=> S E9
L1 2977 H04L0001-00A1/EPC
=> D EPC
L1 ANSWER 1 OF 2977 INPADOCDB COPYRIGHT 2011 EPO/FIZ KA on STN
EPC H04L0001-18P; H04L0001-00A1; H04L0027-26M
ECLA codes are available for all publications where the classification is assigned by the European Patent Office (PCT
minimum documentation). This way about half of all documents are accessible using an ECLA code.
Note: The ECLA is updated quite frequently (see the file banner in INPADOCDB and INPAFAMDB). So the codes
should be checked before every search using them. It is also important to note that as a rule the ECLA codes are not
available immediately when a new document is entered in the database but that they are often added later.
18.4.2 ICO Classification
The ICO classification was newly introduced and offers additional potential for in-depth searching. The EPO uses ICO
codes to index additional aspects of an invention.
Most ICO codes are similar to EPC codes; in place of A, B, C, D, E, F, G, H the letters K, L, M, N, P, R, S, T are used as the
first letter.