Johann MEDERNACH was born 1834 in Larochette in a family of Wollenweber, drapiers, known as MEDERNACH-REUTER. 
The Larochette Census of 1861 shows that Johann and his brother Adam had joined their father Mathias in the drapier business .
On 10 April 1866 MEDERNACH applied for a patent for a novel
It would appear that he wished to obtain patent coverage for particular textile designs and for the method of their manufacture on a novel weaving machine. 
Since all the formal requirements had not been fulfilled by MEDERNACH, the Government pointed out to the inventor on 28 April 1866 what was missing : 1°) …; 2°) ….; 3°) … in order that the application could proceed.
One year later, on 19 June 1867, MEDERNACH submitted a description and two drawings to illustrate his invention:
The administrative file does not contain any additional information. No indication could be found that the patent was granted.