Perfect for beginners with simple, common vocabulary
Vintage Innovations Patent Enigma
Challenging puzzle for experienced crossword solvers
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Across
- 1. Trademark-related term evoking Alexander Graham Bell’s telephonic patents
- 2. Electronic apparatus that boosts signal strength in vintage radios
- 4. Early sound recorder and reproducer invented by Edison’s patented device
- 6. Illuminating devices utilizing early patentable optical principles
- 7. Methodical arrangement for accessing patented mechanical contraptions
- 9. Component that encodes numeric pulses in classic telephony
- 11. Variable resistor used in retro electric current control patents
- 14. Vacuum tube type patented for improved television camera tubes
Down
- 3. Obsolete wordplay for a protective mechanism in early gadget patents
- 5. X-ray viewing gadget patented for real-time skeletal imaging
- 8. Rotational storage medium patented by Edison for audio playback
- 10. Seminal solid-state component replacing vacuum tubes in mid-century tech
- 12. Precursory electric communication device revolutionizing long-distance signalling
- 13. Electromagnetic carrier patented for wireless communication across distances
- 15. Light-sensitive device patented for converting photons into electric signals
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