General Knowledge · Inventions and Discoveries
1887 में ग्रामोफोन रिकॉर्ड का पेटेंट किसने कराया था?
- 1गुग्लिएल्मो मार्कोनी
- 2एमिल बर्लिनर✓
- 3अलेक्जेंडर ग्राहम बेल
- 4थॉमस एडिसन
सही उत्तर देखें
एमिल बर्लिनर
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