diff --git a/src/emu/video/vector.h b/src/emu/video/vector.h
index ff154673bc8..2e922d4a922 100644
--- a/src/emu/video/vector.h
+++ b/src/emu/video/vector.h
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Brad Oliver,Aaron Giles,Bernd Wiebelt,Allard van der Bas
 #ifndef __VECTOR__
 #define __VECTOR__
 
diff --git a/src/emu/video/vic4567.h b/src/emu/video/vic4567.h
index 223d4f74190..41d385397fa 100644
--- a/src/emu/video/vic4567.h
+++ b/src/emu/video/vic4567.h
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Peter Trauner
 /*****************************************************************************
  *
  * video/vic4567.h
diff --git a/src/emu/video/voodoo_pci.c b/src/emu/video/voodoo_pci.c
index 609d6cf2628..ede0e406935 100644
--- a/src/emu/video/voodoo_pci.c
+++ b/src/emu/video/voodoo_pci.c
@@ -1,5 +1,5 @@
 // license:???
-// copyright-holders:???
+// copyright-holders:Ted Green
 #include "voodoo_pci.h"
 
 static MACHINE_CONFIG_FRAGMENT( voodoo_pci )
diff --git a/src/emu/video/voodoo_pci.h b/src/emu/video/voodoo_pci.h
index 46d876fb083..f1fd22ce068 100644
--- a/src/emu/video/voodoo_pci.h
+++ b/src/emu/video/voodoo_pci.h
@@ -1,5 +1,5 @@
 // license:???
-// copyright-holders:???
+// copyright-holders:Ted Green
 // 3dfx Voodoo Graphics SST-1/2 emulator.
 
 #ifndef VOODOO_PCI_H
diff --git a/src/tools/nltool.c b/src/tools/nltool.c
index 7ec191bce47..e88618d3997 100644
--- a/src/tools/nltool.c
+++ b/src/tools/nltool.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:GPL-2.0+
+// copyright-holders:Couriersud
 /***************************************************************************
 
     nltool.c
diff --git a/src/tools/romcmp.c b/src/tools/romcmp.c
index 731b0dd3410..68713cb1648 100644
--- a/src/tools/romcmp.c
+++ b/src/tools/romcmp.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Aaron Giles,Nicola Salmoria 
 /***************************************************************************
 
     romcmp.c