No. He drew the patent documents for the telephone but it was Bell's invention.

He also didn't invent the light bulb. Nor did Edison.

Latimer did invent a novel way to produce carbon filament for light bulbs. Many people mistakenly claim that all of Edison's bulbs used bamboo as a filament base material but there's evidence that he tried quite a few materials.

Latimer's influence in the development of incandescent bulbs is inarguable, but the light bulb predates not only him but Thomas Edison as well.