| Class Number |
Class Name |
Patents |
| 379/1.01 |
Diagnostic testing, malfunction indication, or electrical condition measurement |
272 |
| 379/110.01 |
Composite substation or terminal (e.g., having calculator, radio) |
188 |
| 379/111 |
With usage measurement (e.g., call or traffic register) |
328 |
| 379/142.01 |
Reception of calling information at substation in wireline communications system |
411 |
| 379/143 |
With check operated control (e.g., paystation) |
96 |
| 379/156 |
Multi-line or key substation system with selective switching and central switching office connection |
185 |
| 379/167.01 |
Private (e.g., house or intercom) or single line system |
50 |
| 379/177 |
Polystation line system (i.e., party line) |
50 |
| 379/188 |
Call or terminal access alarm or control |
164 |
| 379/201.01 |
Special services |
646 |
| 379/219 |
Plural exchange network or interconnection |
574 |
| 379/242 |
Centralized switching system |
216 |
| 379/333 |
Concentrator or trunk selector |
47 |
| 379/338 |
Repeater (e.g., voice frequency) |
54 |
| 379/350 |
Supervisory or control line signaling |
75 |
| 379/36 |
Free calling from paystation |
14 |
| 379/37 |
Emergency or alarm communications (e.g., watchman's circuit) |
347 |
| 379/387.01 |
Substation or terminal circuitry |
207 |
| 379/398 |
Line equalization or impedance matching |
294 |
| 379/399.01 |
Subscriber line or transmission line interface |
563 |
| 379/406.01 |
Echo cancellation or suppression |
441 |
| 379/414 |
Transmission line conditioning |
62 |
| 379/418 |
Call signal generating (e.g., ringing or tone generator) |
226 |
| 379/419 |
Terminal |
96 |
| 379/441 |
Terminal accessory or auxiliary equipment |
94 |
| 379/457 |
Miscellaneous |
39 |
| 379/52 |
Including aid for handicapped user (e.g., visual, tactile, hearing aid coupling) |
300 |
| 379/55.1 |
Having near field link (e.g., capacitive, inductive) |
39 |
| 379/56.1 |
Having light wave or ultrasonic link for speech or paging signal |
40 |
| 379/67.1 |
Audio message storage, retrieval, or synthesis |
767 |
| 379/90.01 |
Telephone line or system combined with diverse electrical system or signalling (e.g., composite) |
503 |
| 379/900 |
Internet (e.g., internet phone, webphone, internet-based telephony) |
180 |
| 379/901 |
Virtual networks or virtual private networks |
50 |
| 379/902 |
Auto-switch for an incoming voice data, or fax telephone call (e.g., comp/fax/tel) |
107 |
| 379/903 |
Password |
105 |
| 379/904 |
Auto-calling |
47 |
| 379/905 |
Fax mail |
37 |
| 379/906 |
Touchtone message transmission |
26 |
| 379/907 |
Speech recognition via telephone system or component |
3 |
| 379/908 |
Multimedia |
124 |
| 379/909 |
Alternatives |
48 |
| 379/910 |
Bar code or optical character reader with telephone |
19 |
| 379/911 |
Distinctive ringing |
38 |
| 379/912 |
Geographically adaptive |
41 |
| 379/913 |
Person locator or person-specific |
72 |
| 379/914 |
Programmable telephone component |
56 |
| 379/916 |
Touch screen associated with telephone set |
16 |
| 379/917 |
Voice menus |
11 |
