Passive voice to active voice .Can someone check to see if these are done right?

1. Although a part of the original formula invented by Dr. John S. Pemberton, coca leaves have not been used by the company to make coca-cola since around 1905.
Dr.John S. Pemberton invented a part of the origional formula.Since 1905 coca leaves have not been used by the company to make Coca-Cola.

2. The name, Coca-Cola, was coined and trademarked by Frank M. Robinson, one of Dr. John S.Pemberton’s business partners.
Frank M.Robinson,one of Dr.John S.Pembertons business partners was coined and trademarked the name Coca-Cola.

"Since 1905, coca leaves..." is still in passive voice. And, you elided the word "although". This does not need to be two sentences.

"was coined"?? Frank M. Robinson was coined? He was made of copper or silver? He coined the name, he was not coined or invented.

You also need a comma after "...business partners, coined..."

To convert the given sentences from passive voice to active voice, you need to focus on changing the structure of the sentence so that the subject becomes the doer of the action.

1. Original: Although a part of the original formula invented by Dr. John S. Pemberton, coca leaves have not been used by the company to make Coca-Cola since around 1905.
Active: Dr. John S. Pemberton invented a part of the original formula, but the company has not used coca leaves to make Coca-Cola since around 1905.

Explanation: In the original sentence, the subject "coca leaves" is the receiver of the action ("have not been used"). In the active voice, the subject changes to "Dr. John S. Pemberton," who becomes the doer of the action. Additionally, the phrase "a part of the original formula" is moved to the beginning for clarity.

2. Original: The name, Coca-Cola, was coined and trademarked by Frank M. Robinson, one of Dr. John S. Pemberton's business partners.
Active: Frank M. Robinson, one of Dr. John S. Pemberton's business partners, coined and trademarked the name Coca-Cola.

Explanation: In the original sentence, the subject "the name, Coca-Cola" is the receiver of the action ("was coined and trademarked"). In the active voice, the subject changes to "Frank M. Robinson," who becomes the doer of the action. The phrase "one of Dr. John S. Pemberton's business partners" is kept in the same position for clarity.