[Answer] In addition to the telephone, what else did Alexander Graham Bell invent?

Step 1 : Introduction to the question "In addition to the telephone, what else did Alexander Graham Bell invent?"

...In 1881, after President James Garfield was shot in the back, doctors struggled to locate the bullet. Inventor Alexander Graham Bell stepped in and designed an early version of the metal detector in an effort to find it. His experimental device operated on the principle of electromagnetic induction—technology still used in modern metal detectors. Although the attempt was ultimately unsuccessful, likely due to interference from the metal bed frame, Bell’s invention was a remarkable scientific innovation and a testament to his ingenuity and curiosity.

Step 2 : Answer to the question "In addition to the telephone, what else did Alexander Graham Bell invent?"

Metal detector:

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