Added more information.

unsupported/hp-scanjet-3970c.html

@@ -40,9 +40,12 @@
       higher.
     </p>
     <p>
-      The Manual also mentions these scanners: HP Scanjet 2400, HP Scanjet 3670,
+      The manual also mentions these scanners: HP Scanjet 2400, HP Scanjet 3670,
       HP Scanjet 3690.
     </p>
+    <p>
+      Includes a transparency adapter.
+    </p>
     <h2>Output of /proc/bus/usb/devices or sane-find-scanner -v -v</h2>
     <pre>
 T:  Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 15 Spd=12  MxCh= 0
@@ -69,6 +72,71 @@ I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=ff Driver=(none)
 E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E:  Ad=83(I) Atr=03(Int.) MxPS=   1 Ivl=256ms
+
+&lt;device descriptor of 0x03f0/0x2305 at 001:002 (hewlett packard hp scanjet)&gt;
+bLength               18
+bDescriptorType       1
+bcdUSB                2.00
+bDeviceClass          0
+bDeviceSubClass       0
+bDeviceProtocol       0
+bMaxPacketSize0       64
+idVendor              0x03F0
+idProduct             0x2305
+bcdDevice             1.00
+iManufacturer         1 (hewlett packard)
+iProduct              2 (hp scanjet)
+iSerialNumber         3 (SCN37KT111K7Y)
+bNumConfigurations    1
+ &lt;configuration 0&gt;
+ bLength              9
+ bDescriptorType      2
+ wTotalLength         39
+ bNumInterfaces       1
+ bConfigurationValue  1
+ iConfiguration       4 (USB SCANNER)
+ bmAttributes         224 (Self-poweredRemote Wakeup)
+ MaxPower             2 mA
+  &lt;interface 0&gt;
+   &lt;altsetting 0&gt;
+   bLength            9
+   bDescriptorType    4
+   bInterfaceNumber   0
+   bAlternateSetting  0
+   bNumEndpoints      3
+   bInterfaceClass    255
+   bInterfaceSubClass 0
+   bInterfaceProtocol 255
+   iInterface         5 (Bulk-In, Bulk-Out, Interrupt Interface)
+    &lt;endpoint 0&gt;
+    bLength           7
+    bDescriptorType   5
+    bEndpointAddress  0x81 (in 0x01)
+    bmAttributes      2 (bulk)
+    wMaxPacketSize    512
+    bInterval         0 ms
+    bRefresh          0
+    bSynchAddress     0
+    &lt;endpoint 1&gt;
+    bLength           7
+    bDescriptorType   5
+    bEndpointAddress  0x02 (out 0x02)
+    bmAttributes      2 (bulk)
+    wMaxPacketSize    512
+    bInterval         0 ms
+    bRefresh          0
+    bSynchAddress     0
+    &lt;endpoint 2&gt;
+    bLength           7
+    bDescriptorType   5
+    bEndpointAddress  0x83 (in 0x03)
+    bmAttributes      3 (interrupt)
+    wMaxPacketSize    1
+    bInterval         12 ms
+    bRefresh          0
+    bSynchAddress     0
+found USB scanner (vendor=0x03f0 [hewlett packard], product=0x2305 [hp scanjet])
+ at libusb:001:002
     </pre>
     
     <h1>Want to add or correct information?</h1>

unsupported/hp-scanjet-4600.html

@@ -39,6 +39,10 @@
       software, and so does Adobe Photoshop Elements (with a HP supplied
       plug-in), but Apple's "Image Capture" does not see it."
     </p>
+    <p>
+      The 4670 is the same as the 4600 but has an additional transparency
+      adapter.
+    </p>
     <h2>Output of /proc/bus/usb/devices or sane-find-scanner -v -v</h2>
     <pre>
 4600: