Friedrich Gottlob Keller (27 June 1816 – 8 September 1895) was a German machinist and inventor, who (at the same time as Charles Fenerty) invented the wood pulp process for use in papermaking.

In his late years he recalled an article he read in his youth about the work of the French mathematician René Antoine Ferchault de Réaumur.

Réaumur himself never pursued the idea (later saying in 1742, "I am ashamed not yet to have tried this [paper making from trees] experiment since it is more than twenty years since I have realized the importance of it and since I have announced it.").

He had spent most of his life so far working with his father as a weaver and heddle maker, and on the side attempting to invent all sorts of machines.

In the summer of 1844 he sent in a sample paper to the German government, hoping to obtain financial support for an improved wood-grinder machine and to develop papermaking further, but without success.

Keller remained dedicated to the project, but since he could not obtain national support he sold his invention to a paper specialist, Heinrich Voelter, for about £80.

However, in 1870 he received from a number of German paper makers and other associations a small sum of money, which he used to buy a house in Krippen, Germany.

Towards the end of his life a fair sum of money was collected for him in various countries, enough for a worry-free retirement, and he also received several awards in recognition of his invention.