diff --git a/backend/u12-ccd.c b/backend/u12-ccd.c
index 58fd70d39..d2e870a55 100644
--- a/backend/u12-ccd.c
+++ b/backend/u12-ccd.c
@@ -2,8 +2,7 @@
  * @brief here we have the whole code to intialize the CCD and DAC stuff
  *
  * based on sources acquired from Plustek Inc.
- * Copyright (c) 2000 Plustek Inc.
- * Copyright (c) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12-hw.c b/backend/u12-hw.c
index 176fbe177..f93af35cc 100644
--- a/backend/u12-hw.c
+++ b/backend/u12-hw.c
@@ -1,7 +1,7 @@
 /** @file u12-hw.c
  *  @brief The HW-access functions to the U12 backend stuff.
  *
- * Copyright (c) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12-hwdef.h b/backend/u12-hwdef.h
index 03feb935b..877e00912 100644
--- a/backend/u12-hwdef.h
+++ b/backend/u12-hwdef.h
@@ -1,7 +1,7 @@
 /** @file u12-hwdef.h
  *  @brief Definitions for the ASIC.
  *
- * Copyright (c) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12-if.c b/backend/u12-if.c
index 15ffd680c..9ba94837f 100644
--- a/backend/u12-if.c
+++ b/backend/u12-if.c
@@ -1,7 +1,7 @@
 /** @file u12-if.c
  *  @brief The interface functions to the U12 backend stuff.
  *
- * Copyright (c) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12-image.c b/backend/u12-image.c
index 8692ad934..ff6564a13 100644
--- a/backend/u12-image.c
+++ b/backend/u12-image.c
@@ -2,7 +2,7 @@
  * @brief functions to convert scanner data into image data
  *
  * based on sources acquired from Plustek Inc.
- * Copyright (c) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12-io.c b/backend/u12-io.c
index 43274866f..5bd6f9a98 100644
--- a/backend/u12-io.c
+++ b/backend/u12-io.c
@@ -1,7 +1,7 @@
 /** @file u12-io.c
  *  @brief The I/O functions to the U12 backend stuff.
  *
- * Copyright (c) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  * GeneSys Logic I/O stuff derived from canon630u-common.c which has
  * been written by Nathan Rutman <nathan@gordian.com>
  *
diff --git a/backend/u12-map.c b/backend/u12-map.c
index 3fa61d8d3..8a4a0234d 100644
--- a/backend/u12-map.c
+++ b/backend/u12-map.c
@@ -1,7 +1,7 @@
 /* @file u12_map.c
  * @brief functions to create and manipulate gamma lookup tables.
  *
- * Copyright (C) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (C) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12-motor.c b/backend/u12-motor.c
index da626dd4b..31782f175 100644
--- a/backend/u12-motor.c
+++ b/backend/u12-motor.c
@@ -2,7 +2,7 @@
  * @brief all functions for motor control
  *
  * based on sources acquired from Plustek Inc.
- * Copyright (C) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (C) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12-scanner.h b/backend/u12-scanner.h
index c2a4c6a24..a3e2bec7d 100644
--- a/backend/u12-scanner.h
+++ b/backend/u12-scanner.h
@@ -1,7 +1,7 @@
 /** @file u12-scanner.h
  *  @brief Definitions for the devices.
  *
- * Copyright (c) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12-shading.c b/backend/u12-shading.c
index 4ded15160..cccff7ccb 100644
--- a/backend/u12-shading.c
+++ b/backend/u12-shading.c
@@ -2,8 +2,7 @@
  * @brief all the shading functions
  *
  * based on sources acquired from Plustek Inc.
- * Copyright (C) 1998 Plustek Inc.
- * Copyright (C) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (C) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12-tpa.c b/backend/u12-tpa.c
index cc70ff6df..72e3b1aa6 100644
--- a/backend/u12-tpa.c
+++ b/backend/u12-tpa.c
@@ -2,8 +2,7 @@
  * @brief Here we find some adjustments according to the scan source.
  *
  * based on sources acquired from Plustek Inc.
- * Copyright (C) 1998 Plustek Inc.
- * Copyright (C) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (C) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12.c b/backend/u12.c
index c6527acf6..29a47085a 100644
--- a/backend/u12.c
+++ b/backend/u12.c
@@ -3,7 +3,7 @@
  *         the GeneSys Logic GL640 parallel-port to USB bridge.
  *
  * Based on source aquired from Plustek<br>
- * Copyright (c) 2003 Gerhard Jaeger <gerhard@gjaeger.de><br>
+ * Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de><br>
  *
  * History:
  * - 0.01 - initial version
diff --git a/backend/u12.h b/backend/u12.h
index 76ef766ff..51331244f 100644
--- a/backend/u12.h
+++ b/backend/u12.h
@@ -1,7 +1,7 @@
 /** @file u12.h
  *  @brief Definitions for the backend.
  *
- * Copyright (c) 2003 Gerhard Jaeger <gerhard@gjaeger.de>
+ * Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
  *
  * History:
  * - 0.01 - initial version