Signalling Means Patents (Class 368/243)
- With variable loudness or tone (Class 368/245)
- With same day plural time selection (Class 368/246)
- For more than one day (e.g., eight-day clock) (Class 368/247)
- With automatic repetition over short interval (Class 368/248)
- With signal condition indicator (Class 368/249)
- Electrical (Class 368/250)
- With combined alarm and time motor (Class 368/260)
- Plural (Class 368/261)
- With shutoff (Class 368/262)
- With let-off (Class 368/265)