query: SELECT ?item ?inv WHERE {
    ?item wdt:P31 wd:Q3305213 .
    ?item p:P217 ?invstatement .
    ?invstatement ps:P217 ?inv .
    ?invstatement pq:P195 wd:Q430682 .
    MINUS { ?item wdt:P195  wd:Q180788 .
             ?item p:P217 ?invstatement2 .
             ?invstatement2 ps:P217 ?inv2 .
    		?invstatement2 pq:P195 wd:Q180788 .
          }
    FILTER regex(?inv, "^N\\d+$") 
    } ORDER BY ?inv LIMIT 200