diff --git a/g85/main.py b/g85/main.py
index 203c570..8bbf144 100644
--- a/g85/main.py
+++ b/g85/main.py
@@ -22,8 +22,8 @@ class Device:
 
     bin_pass: dict[int | str, bool] = field(default_factory=dict)  # Is this bin passing?
     map: list[list[int]] | list[list[str]] = field(default_factory=list)   # The actual map
-    # Map attribs: MapName, MapVersion
-    # SupplierData attribs: ProductCode, RecipeName
+    data_misc: dict[str, str] = field(default_factory=dict)    # <Data attribs>
+    supplier_data: dict[str, str] = field(default_factory=dict)    # <SupplierData attribs>
 
     misc: dict[str, str] = field(default_factory=dict)  # Any unexpected fields go here
 
diff --git a/g85/read.py b/g85/read.py
index 987bff7..d4d0901 100644
--- a/g85/read.py
+++ b/g85/read.py
@@ -114,6 +114,12 @@ def read_devices(el_map: ElementTree.Element) -> list[Device]:
                 else:
                     data = data_strs
                 device.map = data
+                for key, value in attrib.items():
+                    device.data_misc[key] = value
+            elif tag == 'SupplierData':
+                for key, value in attrib.items():
+                    device.supplier_data[key] = value
+
         devices.append(device)
     return devices
 
diff --git a/g85/write.py b/g85/write.py
index 1c7c078..c4832d7 100644
--- a/g85/write.py
+++ b/g85/write.py
@@ -113,6 +113,14 @@ def write_devices(devices: Sequence[Device], el_map: ElementTree.Element) -> Non
                 continue
             el_device.set(key, value)
 
+        for key, value in device.data_misc.items():
+            el_data.set(key, value)
+
+        if device.supplier_data:
+            el_suppdata = ElementTree.SubElement(el_device, 'SupplierData')
+            for key, value in device.data_misc.items():
+                el_suppdata.set(key, value)
+
 
 def prepare_data(data: list[list[str]] | list[list[int]], decimal: bool) -> tuple[list[str], int]:
     is_char = isinstance(data[0][0], str)