गोबाव केस गेलेलायनाय आरो नांलायनायनि उनाव 13 सेप्तेमबर , 1898 आव पाल रुडोल्फनि मुङाव टेलीफोटो-लेन्सनि पेटेन्टा सोलिना दंमोन , अदेबानि बेनि थाखाय अारʼज बिलाइ 2 मे , 1887 आव होदोंमोन ।
After long court case and fights on 13 September 1898 patent was issued on the name of Paul Rudolph , however he had applied for this on 2 May , 1887 .