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NPK        0000080172    
Filing Date Form Type Description Document
2015-04-14 DEF 14A DEFINITIVE PROXY STATEMENT View Document
2015-03-18 4 PRIMARY DOCUMENT View Document
2015-03-18 4 PRIMARY DOCUMENT View Document
2015-03-18 4 PRIMARY DOCUMENT View Document
2015-03-16 10-K FORM 10-K FOR THE FISCAL YEAR ENDED DECEMBER 31, 2014 View Document
2015-02-17 8-K CURRENT REPORT View Document
2015-02-10 SC 13G View Document
2015-02-06 4 PRIMARY DOCUMENT View Document
2015-02-06 4 PRIMARY DOCUMENT View Document
2015-02-06 4 PRIMARY DOCUMENT View Document
2015-02-06 4 PRIMARY DOCUMENT View Document
2015-01-29 SC 13G/A View Document
2015-01-15 SC 13G/A View Document
2014-11-12 4 PRIMARY DOCUMENT View Document
2014-11-07 10-Q FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 28, 2014 View Document
2014-11-03 8-K CURRENT REPORT View Document
2014-10-27 8-K CURRENT REPORT View Document
2014-08-14 4 PRIMARY DOCUMENT View Document
2014-08-08 10-Q FORM 10-Q FOR THE QUARTER ENDED JUNE 29, 2014 View Document
2014-07-28 8-K CURRENT REPORT View Document
2014-06-02 SD FORM SD View Document
2014-05-22 8-K CURRENT REPORT View Document
2014-05-14 10-Q/A AMENDMENT NO. 1 TO FORM 10Q FOR THE QUARTER ENDED MARCH 30, 2014 View Document
2014-05-13 4 PRIMARY DOCUMENT View Document
2014-05-09 10-Q FORM 10-Q FOR THE QUARTER ENDED MARCH 30, 2014 View Document
2014-04-28 8-K CURRENT REPORT View Document
2014-04-15 DEF 14A DEFINITIVE PROXY STATEMENT View Document
2014-04-09 ARS AUTO-GENERATED PAPER DOCUMENT View Document
2014-03-19 4 PRIMARY DOCUMENT View Document
2014-03-19 4 PRIMARY DOCUMENT View Document
2014-03-19 4 PRIMARY DOCUMENT View Document
2014-03-17 10-K FORM 10-K FOR THE FISCAL YEAR ENDED DECEMBER 31, 2013 View Document
2014-02-27 4/A PRIMARY DOCUMENT View Document
2014-02-27 4 PRIMARY DOCUMENT View Document
2014-02-27 4 PRIMARY DOCUMENT View Document
2014-02-18 8-K CURRENT REPORT View Document
2014-02-14 4 PRIMARY DOCUMENT View Document
2014-02-13 4 PRIMARY DOCUMENT View Document
2014-02-13 4 PRIMARY DOCUMENT View Document
2014-02-13 4/A PRIMARY DOCUMENT View Document
2014-02-13 4 PRIMARY DOCUMENT View Document
2014-02-13 4 PRIMARY DOCUMENT View Document
2014-01-30 8-K CURRENT REPORT View Document
2014-01-30 SC 13G/A View Document
2014-01-13 SC 13G/A View Document
2013-12-24 8-K CURRENT REPORT View Document
2013-11-19 4 PRIMARY DOCUMENT View Document
2013-11-12 4 PRIMARY DOCUMENT View Document
2013-11-12 8-K FORM 8-K View Document
2013-11-08 10-Q FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 29, 2013 View Document
2013-10-28 8-K CURRENT REPORT View Document
2013-08-13 4 PRIMARY DOCUMENT View Document
2013-08-09 10-Q FORM 10-Q FOR THE QUARTER ENDED JUNE 30, 2013 View Document
2013-07-29 8-K CURRENT REPORT View Document
2013-07-03 8-K CURRENT REPORT View Document
2013-05-31 3 PRIMARY DOCUMENT View Document
2013-05-24 8-K CURRENT REPORT View Document
2013-05-14 4 PRIMARY DOCUMENT View Document
2013-05-14 4 PRIMARY DOCUMENT View Document
2013-05-10 10-Q FORM 10-Q FOR THE QUARTER ENDED MARCH 31, 2013 View Document
2013-04-29 8-K CURRENT REPORT View Document
2013-04-19 ARS AUTO-GENERATED PAPER DOCUMENT View Document
2013-04-16 DEF 14A DEFINITIVE PROXY STATEMENT View Document
2013-03-26 8-K CURRENT REPORT View Document
2013-03-20 4 PRIMARY DOCUMENT View Document
2013-03-18 10-K FORM 10-K FOR THE FISCAL YEAR ENDED DECEMBER 31, 2012 View Document
2013-02-19 8-K CURRENT REPORT View Document
2013-02-11 SC 13G/A View Document
2013-01-17 SC 13G/A View Document
2012-12-11 8-K CURRENT REPORT View Document
2012-12-05 4 PRIMARY DOCUMENT View Document
2012-12-05 4 PRIMARY DOCUMENT View Document
2012-12-05 4 PRIMARY DOCUMENT View Document
2012-12-05 4 PRIMARY DOCUMENT View Document
2012-11-13 4 PRIMARY DOCUMENT View Document
2012-11-09 10-Q FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 2012 View Document
2012-10-29 8-K CURRENT REPORT View Document
2012-08-14 4 PRIMARY DOCUMENT View Document
2012-08-10 10-Q FORM 10-Q FOR THE QUARTER ENDED JULY 1, 2012 View Document
2012-08-01 8-K CURRENT REPORT View Document
2012-05-18 8-K CURRENT REPORT View Document
2012-05-16 4/A PRIMARY DOCUMENT View Document
2012-05-16 4 PRIMARY DOCUMENT View Document
2012-05-16 4 PRIMARY DOCUMENT View Document
2012-05-11 10-Q FORM 10-Q FOR THE QUARTER ENDED APRIL 1, 2012 View Document
2012-05-01 8-K CURRENT REPORT View Document
2012-04-09 ARS AUTO-GENERATED PAPER DOCUMENT View Document
2012-04-04 DEF 14A DEFINITIVE PROXY STATEMENT View Document
2012-04-02 8-K CURRENT REPORT View Document
2012-03-20 4 PRIMARY DOCUMENT View Document
2012-03-15 10-K FORM 10-K FOR THE FISCAL YEAR ENDED DECEMBER 31, 2011 View Document
2012-02-21 8-K CURRENT REPORT View Document
2012-02-13 SC 13G/A View Document
2012-02-09 4 PRIMARY DOCUMENT View Document
2012-02-09 4 PRIMARY DOCUMENT View Document
2012-02-09 4 PRIMARY DOCUMENT View Document
2012-02-09 4 PRIMARY DOCUMENT View Document
2012-02-09 4 PRIMARY DOCUMENT View Document
2012-01-19 SC 13G/A View Document
2011-11-15 4 PRIMARY DOCUMENT View Document

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