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NPK        0000080172    
Filing Date Form Type Description Document
2017-02-10 SC 13G/A View Document
2017-01-26 4 PRIMARY DOCUMENT View Document
2017-01-26 4 PRIMARY DOCUMENT View Document
2017-01-26 4 PRIMARY DOCUMENT View Document
2017-01-26 4 PRIMARY DOCUMENT View Document
2017-01-25 SC 13G/A View Document
2017-01-11 SC 13G/A View Document
2017-01-09 8-K 8-K View Document
2016-11-14 10-Q 10-Q View Document
2016-10-31 8-K 8-K View Document
2016-08-12 10-Q 10-Q View Document
2016-08-01 8-K 8-K View Document
2016-06-09 8-K 8-K View Document
2016-05-31 SD FORM SD View Document
2016-05-19 8-K 8-K View Document
2016-05-18 4 PRIMARY DOCUMENT View Document
2016-05-13 10-Q 10-Q View Document
2016-05-02 8-K 8-K View Document
2016-04-12 8-K 8-K View Document
2016-04-12 DEF 14A DEFINITIVE PROXY STATEMENT View Document
2016-03-17 4 PRIMARY DOCUMENT View Document
2016-03-17 4 PRIMARY DOCUMENT View Document
2016-03-15 10-K 10-K View Document
2016-02-16 8-K 8-K View Document
2016-02-12 4 PRIMARY DOCUMENT View Document
2016-02-12 4 PRIMARY DOCUMENT View Document
2016-02-12 4 PRIMARY DOCUMENT View Document
2016-02-12 4 PRIMARY DOCUMENT View Document
2016-02-12 4 PRIMARY DOCUMENT View Document
2016-02-10 SC 13G/A View Document
2016-01-27 SC 13G/A View Document
2016-01-19 SC 13G/A View Document
2015-12-02 3 PRIMARY DOCUMENT View Document
2015-11-24 8-K 8-K View Document
2015-11-18 4 PRIMARY DOCUMENT View Document
2015-11-13 10-Q 10-Q View Document
2015-11-02 8-K 8-K View Document
2015-10-23 8-K 8-K View Document
2015-08-18 4 PRIMARY DOCUMENT View Document
2015-08-14 10-Q FORM 10-Q FOR THE QUARTER ENDED JULY 5, 2015 View Document
2015-08-03 8-K 8-K View Document
2015-06-30 8-K FORM 8-K DATED JUNE 25, 2015 View Document
2015-06-01 SD SD View Document
2015-05-21 8-K CURRENT REPORT View Document
2015-05-15 10-Q FORM 10-Q FOR THE QUARTER ENDED APRIL 5, 2015 View Document
2015-05-04 8-K CURRENT REPORT View Document
2015-04-22 ARS AUTO-GENERATED PAPER DOCUMENT View 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

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