▁made ▁several ▁great ▁invent ions ▁in ▁the ▁preceding ▁years . ▁In ▁a ▁letter ▁to ▁K å re ▁F oster vol l ▁in ▁the ▁aut umn ▁of ▁ 1 9 4 5 , ▁he ▁said ▁that ▁his ▁" series ▁of ▁invent ions " ▁would ▁" br ing ▁honor ▁and ▁benefit ▁to ▁me ▁and ▁my ▁country . ▁They ▁are — after ▁my ▁calculations — the ▁most ▁important ▁discover ies ▁ever ▁made ▁in ▁history ▁by ▁a ▁single ▁man ". ▁ ▁On ▁ 1 ▁February ▁ 1 9 4 7 , ▁during ▁the ▁legal ▁pur ge ▁in ▁Norway ▁after ▁World ▁War ▁II ▁he ▁was ▁conv icted ▁of ▁tre ason ▁and ▁sent enced ▁to ▁six ▁months ▁in ▁prison ▁and ▁loss ▁of ▁his ▁job . ▁ ▁References ▁ ▁Category : 1 8 8 6 ▁birth s ▁Category : 1 9 6 1 ▁death s ▁Category : Pe ople ▁from ▁ Ø r sta ▁Category : Pe ople ▁from ▁R j uk an ▁Category : N or weg ian ▁educ ators ▁Category : V old a ▁University ▁College ▁al umn i ▁Category : Pol it icians ▁from ▁Te lem ark ▁Category : Lab our ▁Party ▁( N or way ) ▁polit icians ▁Category : M embers ▁of ▁the ▁St ort ing ▁Category : G overn ment ▁minister s ▁of ▁Norway ▁Category : M embers ▁of ▁Nas j onal ▁Sam ling ▁Category : Pe ople ▁conv icted ▁of ▁tre ason ▁for ▁Naz i ▁Germany ▁against ▁Norway <0x0A> </s> ▁F ay za ▁Ah med ▁( ; ▁December ▁ 5 , ▁ 1