diff --git a/comtypes/_post_coinit/unknwn.py b/comtypes/_post_coinit/unknwn.py
index db004b95..ed644a15 100644
--- a/comtypes/_post_coinit/unknwn.py
+++ b/comtypes/_post_coinit/unknwn.py
@@ -22,7 +22,7 @@
 def _shutdown(
     func=_CoUninitialize,
     _debug=logger.debug,
-):
+) -> None:
     # Sometimes, CoUninitialize, running at Python shutdown,
     # raises an exception.  We suppress this when __debug__ is
     # False.
@@ -135,7 +135,7 @@ def __new__(cls, name, bases, namespace):
 
         return self
 
-    def __setattr__(self, name, value):
+    def __setattr__(self, name: str, value: Any) -> None:
         if name == "_methods_":
             # XXX I'm no longer sure why the code generator generates
             # "_methods_ = []" in the interface definition, and later
@@ -149,11 +149,11 @@ def __setattr__(self, name, value):
             self._make_specials()
         type.__setattr__(self, name, value)
 
-    def _make_specials(self):
+    def _make_specials(self) -> None:
         # This call installs methods that forward the Python protocols
         # to COM protocols.
 
-        def has_name(name):
+        def has_name(name: str) -> bool:
             # Determine whether a property or method named 'name'
             # exists
             if self._case_insensitive_:
@@ -168,7 +168,7 @@ def has_name(name):
         if has_name("_NewEnum"):
             _meta_patch.iterator(self)
 
-    def _make_case_insensitive(self):
+    def _make_case_insensitive(self) -> None:
         # The __map_case__ dictionary maps lower case names to the
         # names in the original spelling to enable case insensitive
         # method and attribute access.
@@ -201,7 +201,7 @@ def _make_dispmethods(self, methods: List["_DispMemberSpec"]) -> None:
             if self._case_insensitive_:
                 self.__map_case__[name.lower()] = name
 
-    def __get_baseinterface_methodcount(self):
+    def __get_baseinterface_methodcount(self) -> int:
         "Return the number of com methods in the base interfaces"
         result = 0
         for itf in self.mro()[1:-1]:
@@ -268,7 +268,7 @@ class _compointer_base(c_void_p, metaclass=_compointer_meta):
     if TYPE_CHECKING:
         __com_interface__: ClassVar[Type["IUnknown"]]
 
-    def __del__(self, _debug=logger.debug):
+    def __del__(self, _debug=logger.debug) -> None:
         "Release the COM refcount we own."
         if self:
             # comtypes calls CoUninitialize() when the atexit handlers
@@ -282,7 +282,7 @@ def __del__(self, _debug=logger.debug):
                 _debug("Release %s", self)
                 self.Release()  # type: ignore
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         if not isinstance(other, _compointer_base):
             return False
         # get the value property of the c_void_p baseclass, this is the pointer value
@@ -290,18 +290,18 @@ def __eq__(self, other):
             super(_compointer_base, self).value == super(_compointer_base, other).value
         )
 
-    def __hash__(self):
+    def __hash__(self) -> int:
         """Return the hash value of the pointer."""
         # hash the pointer values
         return hash(super(_compointer_base, self).value)
 
     # redefine the .value property; return the object itself.
-    def __get_value(self):
+    def __get_value(self) -> "hints.Self":
         return self
 
     value = property(__get_value, doc="""Return self.""")
 
-    def __repr__(self):
+    def __repr__(self) -> str:
         ptr = super(_compointer_base, self).value
         return f"<{self.__class__.__name__} ptr=0x{ptr or 0:x} at {id(self):x}>"